Early Christian Belief in God’s Omniscience
Early Christians taught that God knows all things beforehand, sees hidden hearts, and rules history with full foreknowledge. Justin Martyr, Irenaeus, Origen, Tertullian, Hippolytus, and others say this plainly, and the Bible passages here do too. Some texts focus more on prophecy or predestination than a direct definition of omniscience, but the main teaching is clear. A few cards are only indirect, so the page centers the strongest early witnesses.
128 early-church witnesses · 201 source quotations · compared with Scripture
What did early Christians believe about the Omniscience of God and Foreknowledge?
Early Christian writers clearly taught that God knows all things beforehand, including human hearts, future events, and the end from the beginning. Justin Martyr, Irenaeus, Origen, Tertullian, Hippolytus, Theophilus, Clement of Alexandria, and others all speak this way, and several connect that foreknowledge to prophecy and God’s rule over history. The Bible passages in the set, especially 1 Peter 1:2, Acts 2:23, Hebrews 4:13, Psalm 139, and Romans 8:29, line up with that same belief.
The evidence is broad and early, though some snippets are about predestination or prophecy more than a direct statement of omniscience. A few cards are only indirect or are about false teachers who denied foreknowledge, so they are kept out of the main view. Many more early Christian quotations, Bible passages, and source links are gathered below so you can study the evidence for yourself.
Key Takeaways
- Early Christian writers taught that God knows future events, hidden thoughts, and all his works from the beginning.
- Justin Martyr, Irenaeus, Origen, Tertullian, Hippolytus, and Theophilus all connect God’s foreknowledge with prophecy and history.
- Bible passages like 1 Peter 1:2, Acts 2:23, Hebrews 4:13, Psalm 139, and Romans 8:29 strongly match the early Christian view.
Questions Answered by the Sources
Did early Christians say prophecy shows God's foreknowledge?
The sources say God’s foreknowledge is shown when prophets announce future events before they happen. Several writers explicitly use fulfilled prophecy to argue that God knew and ordered events ahead of time.
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Tatian, Address to the Greeks Direct teaching
...n barbarian writings. They were too ancient to be compared with the opinions of the Greeks, and too divine to be compared with their errors. I was led to trust these writings because of the plain style of their language, the natural manner of the writers, the foreknowledge they showed of future events, the excellent quality of their teachings, and their declaration that the government of the universe is centered in one Being. And since my soul was taught by God, I understood that the former writings lead to condemnation, but these bring an end to the slavery that is in the world and rescue us from many rulers and ten thousand tyrants. They give us, not something we had never received before, but something we had received and were kept by error from holding on to.
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Hippolytus, Exegetical Fragments Supporting witness
... was a heavenly dream, fulfilled at its proper times, according to the counsel and foreknowledge of God. For this reason, it was kept secret from men who think about earthly things, so that heavenly mysteries might be revealed to those who seek heavenly things. And indeed, there was a similar case in Egypt in the time of Pharaoh and Joseph.
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Origen, Against Celsus Direct teaching
For God, comprehending all things by means of His foreknowledge, and foreseeing what consequences would result from both of these, wished to make these known to mankind by His prophets, that those who understand their words might be familiarized with the good, and be on their guard against its opposite.
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Theophilus of Antioch, To Autolycus Direct teaching
because God, who possesses foreknowledge, knew the follies of the vain philosophers, that they were going to say, that the things which grow on the earth are produced from the heavenly bodies, so as to exclude God.
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Justin Martyr, Dialogue with Trypho Direct teaching
but this has come to pass through the wonderful foreknowledge of God, in order that we, through the calling of the new and eternal covenant, that is, of Christ, might be found more intelligent and God-fearing than yourselves, who are considered to be lovers of God and men of understanding, but are not.
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Irenaeus, Against Heresies: Book IV Supporting witness
and contained a prophecy of things to come, in order that man might learn that God has foreknowledge of all things.
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Hippolytus, Exegetical Fragments Supporting witness
but it was a heavenly dream, fulfilled in its proper times, according to the counsel and foreknowledge of God.
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Theophilus of Antioch, To Autolycus Direct teaching
On the fourth day, the heavenly lights were made. This was because God, who knows all things beforehand, knew the foolish ideas of the empty philosophers. They were going to say that the things growing on the earth come from the heavenly bodies, and so leave God out. Therefore, so that the truth would be clear, the plants and seeds were produced before the heavenly bodies. What comes later cannot produce what came earlier. These things also contain the pattern and type of a great mystery. The sun is a type of God, and the moon is a type of man. And just as the sun greatly surpasses the moon in power and glory, so God greatly surpasses man. And just as the sun always remains full and never becomes less, so God always remains perfect, being full of all power, understanding, wisdom, immortality, and every good thing. But the moon decreases each month, and in a way dies, being a type of man. Then it is born again and becomes a crescent, as a pattern of the future resurrection. In the same way, the three days before the heavenly lights are types of the Trinity: God, and His Word, and His wisdom. And the fourth is the type of man, who needs light, so that there may be God, the Word, wisd
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Cyprian, Treatises Supporting witness
... were not thrown down by the attack of persecution, but threw themselves down by their own willing fall. What unheard-of thing, I ask you, what new thing had happened, that, as if unknown and unexpected events had occurred, the duty owed to Christ should be cast off with reckless haste? Had not the prophets before, and afterward the apostles, spoken of these things? Had they not, being full of the Holy Spirit, foretold the afflictions of the righteous and always the injuries done by the heathens? Does not Holy Scripture, which always arms our faith and strengthens God's servants with a voice from heaven, say, "You shall worship the Lord your God, and Him only shall you serve"? Deuteronomy 6:13 Does it not also show the anger of divine indignation and warn beforehand of the fear of punishment when it says, "They worshiped those which their fingers have made; and the lowly man bows down, and the great man humbles himself, and I will not forgive them"? Isaiah 2:8-9 And again, God speaks and says, "He that sacrifices to any gods, except to the Lord only, shall be destroyed." Exodus 22:20 In the Gospel also, the Lord, who teaches by His words and fulfills by His deeds, teaching what
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Novatian, Treatise Concerning the Trinity Supporting witness
...o be understood as the Father Himself. Rather, He meant that the person who came near to the Son of God completely and fully, with all faith and all reverence, would certainly reach the Father through the Son Himself, in whom he believes, and would see Him. For He says, "No one can come to the Father but by me." Therefore, such a person will not only come to God the Father and know the Father Himself, but he ought also to hold this in his mind and heart, and so be assured, that from now on he has not only known the Father, but seen Him. For divine Scripture often announces things that are not yet done as if they were already done, because that is how they certainly will be. And things that must happen, it does not predict as though they were future, but tells them as though they were already finished. So, although Christ had not yet been born in the days of Isaiah the prophet, he said, "For to us a child is born." And although Mary had not yet been approached, he said, "And I approached the prophetess, and she conceived and bore a son." And when Christ had not yet made known the mind of the Father, it is said, "And His name shall be called the Angel of Great Counsel." And when H
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Irenaeus, Against Heresies: Book IV Supporting witness
...st the followers of Marcion and others like them, who claim that the prophets were from a different God than the one announced in the Gospel, read the Gospel given to us by the apostles with care, and also read the prophets carefully. You will find that the entire conduct, teachings, and sufferings of our Lord were predicted by them. If you then wonder, "What did the Lord bring us with His coming?"—know that He brought all possible newness by bringing Himself, who had been announced. This was predicted beforehand: that a novelty would come to renew and invigorate humanity. The arrival of the King is announced first by servants who are sent ahead to prepare the men who are to receive their Lord. But when the King has actually arrived, and His subjects have been filled with the joy foretold and have attained the freedom He gives, sharing in His presence, listening to His words, and enjoying His gifts, no sensible person would ask what new thing the King brought beyond what was announced by those who proclaimed His coming. For He has brought Himself and has given men the good things that were announced beforehand, things that even the angels desired to look into.
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Tertullian, Against Marcion Supporting witness
In the Creator, however, the two courses were perfectly compatible — both the predestination before the ages and the revelation at the end thereof, because that which He both fore-ordained and revealed He also in the intermediate space of time announced by the pre-ministration of figures, and symbols, and allegories.
More related quotations from this section 7 shown
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Cyprian, Epistles Supporting witness
What of the prophets whom the Holy Spirit quickened to the foreknowledge of future events?
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1 Peter 1:11 Supporting witness
Searching what, or what manner of time the Spirit of Christ which was in them did signify, when it testified beforehand the sufferings of Christ, and the glory that should follow.
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Amos 3:7 Supporting witness
“For the Lord GOD does nothing without revealing his secret to his servants the prophets.
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Acts 3:18 Supporting witness
But those things, which God before had shewed by the mouth of all his prophets, that Christ should suffer, he hath so fulfilled.
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1 Peter 1:10 Supporting witness
Of this salvation the prophets have inquired and searched carefully, who prophesied of the grace that would come to you,
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Acts 4:28 Supporting witness
For to do whatsoever thy hand and thy counsel determined before to be done.
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Micah 3:7 Supporting witness
For the Lord God will do nothing, without revealing instruction to his servants the prophets.
Did early Christians connect foreknowledge with predestination?
Some sources connect God’s foreknowledge with predestination, election, or foreordaining events and people. These texts do not present foreknowledge as guesswork, but as part of God’s settled purpose.
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Origen, Commentary on Matthew Direct teaching
...longer under any wicked power? Or have angels been appointed over them from birth, according to the foreknowledge and predestination of God, over those whom God also foreknew and predestined to be conformed to the glory of the Christ, Romans 8:29? And in support of the view that they have angels from birth, one might quote, "He who separated me from my mother's womb," Galatians 1:15, and, "From the womb of my mother you have been my protector," and, "He has helped me from my mother's womb," and, "Upon you I was cast from my mother," and in the Epistle of Jude, "To those who are beloved in God the Father and kept for Jesus Christ, called," Jude 1—kept completely by the angels who keep them.
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Irenaeus, Against Heresies: Book IV Supporting witness
...d have not heard them.” How, then, could they have both wanted to hear and to see unless they had a foreknowledge of His future coming? But how could they have foreknown it unless they had already received this knowledge from Him? And how do the Scriptures testify about Him, unless all things have always been revealed and shown to believers by one and the same God through the Word? At one time, He communicated with His creation, and at another, He gave His law; at one time, He corrected and at another, encouraged, then freed His servant, and adopted him as a son; and, at the right time, granted an incorruptible inheritance to bring humanity to perfection. For He created humans for growth and increase, as the Scripture states: “Increase and multiply.”
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Hippolytus, Refutation of All Heresies Supporting witness
For He is fully acquainted with whatever is about to take place, for foreknowledge also is present to Him.
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Clement of Alexandria, The Stromata (Miscellanies) Supporting witness
...ling demonstration twofold: the one resting on knowledge, the other on opinion. Since knowledge and foreknowledge are also described as twofold, one kind essentially accurate and the other defective. And is not the demonstration that we possess the only one that is true, since it is supplied out of the divine Scriptures, the sacred writings, and out of the wisdom taught by God, according to the apostle? Learning, then, is also obedience to the commandments, which is faith in God. And faith is a power of God, being the strength of the truth. For example, it is said, “If you have faith as a grain of mustard, you shall remove the mountain” (Matthew 17:20). And again, “According to your faith let it be to you” (Matthew 9:29). And one person is cured, receiving healing by faith. And the dead person is raised up because of the power of one believing that he would be raised. The demonstration, however, which rests on opinion is human, and is the result of rhetorical arguments or dialectic syllogisms. For the highest demonstration, to which we have referred, produces intelligent faith by bringing forward and opening up the Scriptures to the souls of those who desire to learn. The result
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Origen, Commentary on Matthew Supporting witness
or, whether from birth they had been appointed, according to the foreknowledge and predestination of God, over those whom God also foreknew, and foreordained to be conformed to the glory of the Christ.
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Clement of Alexandria, The Stromata (Miscellanies) Supporting witness
Now, not only demonstration and belief and knowledge, but foreknowledge also, are used in a twofold manner.
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Gregory Thaumaturgus, Metaphrase of Ecclesiastes Supporting witness
and those which are to be, have already been, as regards His foreknowledge.
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Tertullian, Against Marcion Supporting witness
both His natural goodness, and the purposes of His governance and foreknowledge, and the abundance of His power.
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Clement of Alexandria, The Stromata (Miscellanies) Supporting witness
since also knowledge and foreknowledge are designated as twofold, that which is essentially accurate, that which is defective.
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Irenaeus, Against Heresies: Book IV Supporting witness
But how could they have foreknown it, unless they had previously received foreknowledge from Himself?
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Gregory Thaumaturgus, Metaphrase of Ecclesiastes Supporting witness
... to the words of the king, and by every means to avoid an oath, especially one taken in the name of God. At the same time, it may be proper to take notice of an evil word, but it is necessary to guard against any blasphemy against God. For it will not be possible to find fault with Him when He inflicts any punishment, nor to speak against the decrees of the only Lord and King. But it is better and more profitable for a man to remain faithful to the holy commandments and to keep himself separate from the words of the wicked. For the wise man knows and discerns beforehand the judgment that will come at the right time, and sees that it will be just. For all things in human life await retribution from above. But the wicked man truly does not seem to know that, since a mighty providence watches over him, nothing in the future will be hidden. He does not know the things that will be, for no man will be able to announce any of them to him properly. For no one will be found strong enough to stop the angel who takes his life away, nor will any way be found to cancel the appointed time of death. But just as a man captured in the middle of battle can only see that escape is cut off on ever
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Novatian, Treatise Concerning the Trinity Supporting witness
Thus God the Father, the Founder and Creator of all things, who alone knows no beginning, invisible, infinite, immortal, eternal, is one God. To His greatness, or majesty, or power, I would not merely say that nothing can be preferred, but that nothing can be compared. From Him, when He willed it, the Son, the Word, was born. He is not received in the sound of struck air, or in the tone of a voice forced from the lungs, but is acknowledged in the substance of the power put forth by God. The mysteries of His sacred and divine nativity no apostle has learned, no prophet has discovered, no angel has known, and no creature has grasped. They are known to the Son alone, who has known the secrets of the Father. Then, since He was begotten of the Father, He is always in the Father. And I say always in this way, so that I may show that He is not unborn, but born. But He who is before all time must be said to have always been in the Father, for no time can be assigned to Him who is before all time. And He is always in the Father, unless the Father has not always been Father. Only, in a certain sense, the Father also goes before Him, since it is necessary, in some degree, that He should be be
More related quotations from this section 13 shown
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Romans 8:29 Supporting witness
For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.
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Ephesians 1:11 Supporting witness
In him we have obtained an inheritance, having been predestined according to the purpose of him who works all things according to the counsel of his will,
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Romans 8:30 Supporting witness
And those whom he predestined he also called, and those whom he called he also justified, and those whom he justified he also glorified.
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Apostolic Constitutions, Apostolic Constitutions Supporting witness
another, discerning of spirits; another, foreknowledge of things to come;
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1 Peter 1:20 Supporting witness
Who verily was foreordained before the foundation of the world, but was manifest in these last times for you,
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Ephesians 1:5 Supporting witness
he predestined us for adoption as sons through Jesus Christ, according to the purpose of his will,
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Ephesians 1:4 Supporting witness
even as he chose us in him before the foundation of the world, that we should be holy and blameless before him. In love
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Victorinus, Commentary on the Apocalypse Supporting witness
So God the Father, the Founder and Creator of all things, who alone knows no beginning, invisible, infinite, immortal, and eternal, is one God. To His greatness, majesty, and power, I would not merely say that nothing can be placed above them, but that nothing can be compared with them. From Him, when He willed it, the Son, the Word, was born. He is not understood as a sound in the air, or as a voice forced out from the lungs, but is acknowledged as the substance of the power brought forth by God. The mysteries of His holy and divine birth have been learned by no apostle, discovered by no prophet, known by no angel, and grasped by no creature. They are known to the Son alone, who has known the secrets of the Father. Then, since He was begotten of the Father, He is always in the Father. I say "always" in this way to show that He is not unborn, but born. But He who is before all time must be said to have always been in the Father, because no time can be assigned to Him who is before all time. And He is always in the Father, unless the Father has not always been Father, except that the Father also goes before Him in a certain sense, since it is necessary in some degree that He should
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Novatian, Treatise Concerning the Trinity Supporting witness
Because even if He is said to be glorious in predestination, and that this predestination was before the foundation of the world, let order be maintained, and before Him a considerable number of men was destined to glory.
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Novatian, Treatise Concerning the Trinity Supporting witness
For since with God the order of all, both persons and things, is arranged, many will be said to have been predestinated before this predestination of Christ to glory.
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Novatian, Treatise Concerning the Trinity Supporting witness
For the divine Scripture, foreseeing, speaks of things which it knows shall be as being already done, and speaks of things as perfected which it regards as future, but which shall come to pass without any doubt.
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Lactantius, The Divine Institutes Supporting witness
What the Most High Father arranged from the beginning, and how He ordained all things which were accomplished, not only the foretelling by the prophets, which preceded and was proved true in Christ, but also the manner of His suffering itself teaches.
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Victorinus, Commentary on the Apocalypse Supporting witness
Because even if He is said to be glorious in predestination, and that this predestination was before the foundation of the world, let order be maintained, and before Him a considerable number of men was destined to glory.
Common Questions
Did early Christians believe God knows everything before it happens?
Yes. Justin Martyr, Irenaeus, Origen, Tertullian, and others speak of God’s foreknowledge, and Bible passages like Acts 2:23 and 1 Peter 1:2 say the same.
Did early Christians connect foreknowledge with prophecy?
Yes. Many of the writers tie God’s foreknowledge to prophecy, showing that God reveals future events before they happen.
Did they also teach that God knows human hearts?
Yes. The Bible passages in this set say God sees all things and knows hearts, and early Christian writers echo that truth.
Source Index for the Omniscience of God and Foreknowledge
The guided sections above show the strongest quotations. This compact index highlights 153 ranked source links from 201 compiled sources for deeper study.
Source index 153 ranked links shown
Early Christian Writings 80 shown of 128
Primary-source quotations from early Christian writers and church documents.
Bible Passages 73 included
Related Bible passages saved for comparison with the early Christian quotations.