That God was able. — These words are better taken as the expression of a general truth — “Accounting that God is able to raise up even from the dead.’ The faith which tests and brings conviction of the things not seen made this reasoning possible, and gave power to act upon it even when Isaac must be slain.
From whence also. — Better, from whence he did in a figure (literally, a parable) receive him. As in a figure the offering was completely carried out (Hebrews 11:17), so also in figure he received his son back from the dead.