On the Flesh of Christ

Since(24) you think that this lay within the competency of your own arbitrary choice, you must needs have supposed that being born(25) was either impossible for God, or unbecoming to Him. With God, however, nothing is impossible but what He does not will. Let us consider, then, whether He willed to be born (for if He had the will, He also had the power, and was born). I put the argument very briefly. If God had willed not to be born, it matters not why, He would not have presented Himself in the likeness of man.