(16) By myself have I sworn, saith the Lord (Jehovah).--This solemn interposition of an oath (Hebrews 6:17), of which the present is the sole instance in Holy Scripture, plainly indicates that this trial of Abraham's faith was of no common kind, and that its typical teaching is of no ordinary value. Abraham might have appealed to God's own attributes, and said, Far be it from thee, Lord, to command a human sacrifice, and bid a father slay his son. He might have pleaded the promises bound up with Isaac's life. But no, as soon as he is convinced that the command comes from God. he obeys, and, against hope, still believes that the promises will all be fulfilled in the sacrificed Isaac. He is thus the highest and most perfect example of faith, and by his offering of his son the Church received the assurance that the Son of God incarnate in the flesh would upon that very mountain offer the sacrifice Divinely necessary for the pardon of man's sins.

The blessing now given to Abraham differs from those that precede it in three particulars. First, it is no longer a promise, but a solemn compact ratified by an oath. Next, it assures Abraham's seed of victory, whereby the spiritual Israel is certified of the ultimate triumph of the Gospel. Lastly, it transfers to Abraham's offspring the promise of being the means of blessedness to all mankind.

22:15-19 There are high declarations of God's favour to Abraham in this confirmation of the covenant with him, exceeding any he had yet been blessed with. Those that are willing to part with any thing for God, shall have it made up to them with unspeakable advantage. The promise, ver. 18, doubtless points at the Messiah, and the grace of the gospel. Hereby we know the loving-kindness of God our Saviour towards sinful man, in that he hath not withheld his Son, his only Son, from us. Hereby we perceive the love of Christ, in that he gave himself a sacrifice for our sins. Yet he lives, and calls to sinners to come to him, and partake of his blood-bought salvation. He calls to his redeemed people to rejoice in him, and to glorify him. What then shall we render for all his benefits? Let his love constrain us to live not to ourselves, but to Him who died for us, and rose again. Admiring and adoring His grace, let us devote our all to his service, who laid down his life for our salvation. Whatever is dearest to us upon earth is our Isaac. And the only way for us to find comfort in an earthly thing, is to give it by faith into the hands of God. Yet remember that Abraham was not justified by his readiness to obey, but by the infinitely more noble obedience of Jesus Christ; his faith receiving this, relying on this, rejoicing in this, disposed and made him able for such wonderful self-denial and duty.And said, by myself have I sworn, saith the Lord,.... Which Aben Ezra observes is a great oath, and abides for ever; for because he could swear by no greater, he swore by himself, his own nature, perfections, and life, Hebrews 6:13; hence it appears, that the Angel that called to Abraham was a divine Person, the true Jehovah:

for because thou hast done this thing, and hast not withheld thy son,

thine only son; that is, from the Lord, as in Genesis 22:12; and is here repeated as being a most marvellous thing, a wonderful instance of faith in God, and fear of him, and of love and obedience to him; for, with respect to the will of Abraham, and as far as he was suffered to go, it was as much done as it was possible for him to do, and was looked upon as if actually done: yet this is not observed as meritorious of what follows; the promise of which had been made before, but is now repeated to show what notice God took of, and how well pleased he was with what had been done; and therefore renews the promise, which of his own grace and good will he had made, for the strengthening of Abraham's faith, and to encourage others to obey the Lord in whatsoever he commands them.