The Epistle of Ignatius to the Ephesians (Long Version)

Therefore, none of the schemes of the devil shall be hidden from you, if, like Paul, you perfectly possess that faith and love towards Christ, which are the beginning and the end of life. The beginning of life is faith, and the end is love. And these two, being inseparably connected, perfect the man of God, while all other things necessary for a holy life follow them. No one making a profession of faith ought to sin, nor should anyone possessing love hate their brother. For He who said, "You shall love the Lord your God," also said, "and your neighbor as yourself." Those who profess to be Christ’s are known not only by what they say, but by what they practice. "For the tree is known by its fruit."