By faith Abraham, when he was tested, offered up Isaac: and he that had received the promises offered up his only begotten son.
All Commentaries on Hebrews 11:17 Go To Hebrews 11
John Chrysostom
AD 407
1. Great indeed was the faith of Abraham. For while in the case of Abel, and of Noah, and of Enoch, there was an opposition of reasonings only, and it was necessary to go beyond human reasonings; in this case it was necessary not only to go beyond human reasonings, but to manifest also something more. For what was of God seemed to be opposed to what was of God; and faith opposed faith, and command promise.