Genesis 22:16-19

Verse 16

By myself have I sworn - So we find that the person who was called the angel of the Lord is here called Jehovah; See note on Gen 22:2. An oath or an appeal to God is, among men, an end to strife; as God could swear by no greater, he sware by himself: being willing more abundantly, says the apostle, to show unto the heirs of promise the immutability of his counsel, he confirmed it by an oath, that two immutable things, (his Promise and his Oath), in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold on the hope set before us. See Heb 6:13-18.
Verse 17

Shall possess the gate of his enemies - Instead of gate the Septuagint have πολεις, cities; but as there is a very near resemblance between πολεις, cities, and πυλας, gates, the latter might have been the original reading in the Septuagint, though none of the MSS. now acknowledge it. By the gates may be meant all the strength, whether troops, counsels, or fortified cities of their enemies. So Mat 16:18 : On this rock I will build my Church, and the gates of hell shall not prevail against it - the counsels, stratagems, and powers of darkness shall not be able to prevail against or overthrow the true Church of Christ; and possibly our Lord had this promise to Abraham and his spiritual posterity in view, when he spoke these words.
Verse 18

And in thy seed, etc. - We have the authority of St. Paul, Gal 3:8, Gal 3:16, Gal 3:18, to restrain this to our blessed Lord, who was The Seed through whom alone all God's blessings of providence, mercy, grace, and glory, should be conveyed to the nations of the earth.
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