And Abraham lifted up his eyes, and looked, and behold behind him a ram caught in a thicket by his horns: and Abraham went and took the ram, and offered him up for a burnt offering instead of his son.
All Commentaries on Genesis 22:13 Go To Genesis 22
Athanasius the Apostolic
AD 373
Thus the sacrifice was not for the sake of Isaac but for that of Abraham, who was tested by being called upon to make this offering. And of course, God accepted his intentions, but he prevented him from slaying Isaac. The death of Isaac would not buy freedom for the world. No, that could be accomplished only by the death of our Savior, by whose stripes we are all healed.