Genesis 18

Genesis 18:1

And I will give thee Canaan for an everlasting possession - God had before promised this land to Abraham and his seed, Genesis 15:18. But here, it is promised for an everlasting possession, as a type of heaven, that everlasting rest which remains for the people of God. This is that better country to which Abraham had an eye, and the grant of which was that which answered the vast extent of that promise, that God would be to them a God; so that if God had not designed this, he would have been ashamed to be called their God, Hebrews 11:16. As the land of Canaan was secured to the seed of Abraham, according to the flesh; so heaven is secured to all his spiritual seed for a possession truly everlasting. The offer of this eternal life is made in the word, and confirmed by the sacraments, to all that are under the external administration of the covenant, and the earnest of it is given to all believers.

Genesis 18:3

The token of the covenant, is circumcision, for the sake of which the covenant is itself called the covenant of circumcision, Acts 7:8. It is here said to be the covenant which Abraham and his seed must keep, as a copy or counterpart, it is called a sign and seal, Romans 4:11, for it was. A confirmation to Abraham and his seed of those promises which were God’s part of the covenant, assuring them that, in due time, Canaan should be theirs: and the continuance of this ordinance, after Canaan was theirs, intimates, that that promise looked farther, to another Canaan. An obligation upon Abraham and his seed to that duty which was their part of the covenant, not only to the duty of accepting the covenants and putting away the corruption of the flesh, which were primarily signified by circumcision, but in general to the observation of all God’s commands. They who will have God to be to them a God, must consent to be to him a people. Now, 1.

Circumcision was a bloody ordinance, for all things by the law were purged with blood, Hebrews 9:22. See Exodus 24:8. But the blood of Christ being shed, all bloody ordinances are now abolished. Circumcision therefore gives way to baptism. 2. It was peculiar to the males, though the women also were included in the covenant. 3. Christ having not yet offered himself for us, God would have man to enter into covenant, by the offering of some part of his own body, and no part could be better spared. 4.

The ordinance was to be administered to children when they were eight days old, that they might gather some strength to be able to undergo the pain of it. 5. The children of the strangers were to be circumcised, which looked favourable upon the Gentiles, who should, in due time be brought into the family of Abraham, by faith. Here is, (1.) The promise made to Abraham of a son by Sarai, that son in whom the promise made to him should be fulfilled, that he should be the father of many nations, for she also shall be a mother of nations, and kings of people shall be of her, Genesis 17:16. Note, God reveals the purposes of his good - will to his people by degrees. God had told Abraham long before, that he should have a son, but never ’till now that he should have a son by Sarai. The blessing of the Lord makes fruitful, and adds no sorrow with it; no such sorrow as was in Hagar’s case.

I will bless her, with the blessing of fruitfulness, and then thou shalt have a son of her. Civil government and order is a great blessing to the church. It is promised not only that people, but kings of people should be of her; not a headless rout, but a well modelled, well governed society.

Genesis 18:8

Sarah shall her name be - The same letter is added to her name that was to Abraham’s. Sarai signifies my princess, as if her honour were confined to one family only: Sarah signifies a princess, viz. of multitudes.

Genesis 18:10

Then Abraham fell on his face, and laughed - It was a laughter of delight, not of distrust. Now it was that Abraham rejoiced to see Christ’s day, now he saw it and was glad, John 8:56, for as he saw heaven in the promise of Canaan, so he saw Christ in the promise of Isaac, and said, Shall a child be born to him that is an hundred years old? - He doth not here speak of it, as at all doubtful, for we are sure he staggered not at the promise, Romans 4:20, but as wonderful, and that which could not be effected but by the almighty power of God.

Genesis 18:11

And Abraham said, O that Ishmael might live before thee! - This he speaks nor as desiring that Ishmael might be preferred before the son he should have by Sarah, but as dreading lest he should be forsaken of God, he puts up this petition on his behalf. The great thing we should desire of God, for our children, is, that they may live before him, that is, that they may be kept in covenant with him, and may have grace to walk before him in their uprightness. God’s answer to this prayer, is an answer of peace. Abraham could not say he sought God’s face in vain.

Genesis 18:13

As for Ishmael, I have heard thee; I have blessed him - That is, I have many blessings in store for him. His posterity shall be numerous; I will multiply him exceedingly; They shall be considerable; twelve princes shall he beget. We may charitably hope that spiritual blessings also were bestowed upon him, though the visible church was not brought out of his loins.

Genesis 18:14

He names that child, Isaac - Laughter, because Abraham rejoiced in spirit when this son was promised him.

Genesis 18:22

This appearance of God to Abraham seems to have had in it more of freedom and familiarity, and less of grandeur and majesty, than those we have hitherto read of, and therefore more resembles that great visit which in the fulness of time the Son of God was to make to the world. He sat in the tent - door in the heat of the day - Not so much to repose himself, as to seek an opportunity of doing good, by giving entertainment to strangers.

Genesis 18:23

And lo three men - These three men were three spiritual heavenly beings, now assuming human shapes, that they might be visible to Abraham, and conversable with him. Some think they were all three created angels; others, that one of them was the Son of God. He bowed himself towards the ground - Religion doth not destroy but improve good manners, and teaches us to honour all men.

Genesis 18:30

Where is Sarah thy wife? - By naming her, they gave intimation to Abraham, that tho’ they seemed strangers, yet they well knew him and his family: by enquiring after her, they shewed a kind concern for the family of one, whom they found respectful to them. And by speaking of her, she over - hearing it, they drew her to listen to what was farther to be said.

Genesis 18:31

I will certainly return unto thee - And visit thee. God will return to those that bid him welcome.

Genesis 18:33

Sarah laughed within herself - It was not a laughter of faith, like Abraham’s, Genesis 17:17, but a laughter of doubting and distrust. The great objection which Sarah could not get over was her age. I am waxed old, and past child - bearing in a course of nature, especially having been hitherto barren, and which magnifies the difficulty, My lord is old also. Observe here, That Sarah calls Abraham her lord, and the Holy Ghost takes notice of it to her honour, and recommends it to the imitation of all Christian wives, 1 Peter 3:6. Sarah obeyed Abraham calling him lord, in token of respect and subjection.