Genesis 22:17

Multiplying I will multiply thee - Those that part with any thing for God, shall have it made up to them with unspeakable advantage. Abraham has but one son, and is willing to part with that one in obedience to God; well, saith God, thou shalt be recompensed with thousands and millions. Here is a promise, Of the Spirit, In blessing I will bless thee - The Gift of the Holy Ghost; the promise of the Spirit was that blessing of Abraham which was to come upon the Gentiles through Jesus Christ, Galatians 3:14. Of the increase of the church; that believers, his spiritual seed, should be many as the stars of heaven. Of spiritual victories; Thy seed shall possess the gate of his enemies - Believers by their faith overcome the world, and triumph over all the powers of darkness. Probably Zacharias refers to this part of the oath, Luke 1:74. That we being delivered out of the hand of our enemies might serve him without fear. But the crown of all is the last promise, Of the incarnation of Christ; In thy seed (one particular person that shall descend from thee, for he speaks not of many but of one, as the apostle observes, Galatians 3:16.) shall all the nations of the earth be blessed - Christ is the great blessing of the world. Abraham was ready to give up his son for a sacrifice to the honour of God, and on that occasion God promised to give his son a sacrifice for the salvation of man.