Direct Answer
Ignatius’ “medicine” and “antidote” language implies God intends communion to be a real, God-given means of spiritual life—connected to immortality and abiding in Christ—not a bare mental exercise. That challenges an instinct (Bercot critiques) that grace can’t come through physical, created things and must stay only in the “inward” or purely symbolic realm.
Support from Transcript:
Do you think of grace mainly as forgiveness in your mind and heart, or also as God’s life given through His appointed practices? What makes “medicine of immortality” sound either hopeful or threatening to you?