A Step Aside
Now Sarai Abram’s wife bare him no children; and she had an handmaid, an Egyptian, whose name was Hagar. And Sarai said unto Abram, behold now, the Lord hath restrained me from bearing; I pray thee go in unto my maid; it may be that I may obtain children by her. And Abram hearkened unto the voice of Sarai.” (Genesis 16:1,2)Man Cannot Do God’s Work
In the first place, we should learn the folly of man’s trying to fulfill the promises of God. God had promised to Abraham an innumerable seed. When the promise was made, it was beyond all human possibility that Abraham should have a son by his wife, but he accepted the word of the Lord, and his faith was counted to him for righteousness. This in itself was evidence that the seed was not to be an ordinary seed, but that it was to be a seed of faith.Working Against the Promise, instead of for It
Yet how short-sighted the whole thing was. God had made the promise; therefore He alone could fulfill it. If a man makes a promise, the thing promised may be performed by another, but in that case the one who made the promise fails to carry out his word. So even though that which the Lord had promised could have been gained by the device which was adopted, the result would have been to shut the Lord out from fulfilling His word. They were therefore working against God. But His promises cannot be performed by man. In Christ alone can they be performed. It is easy enough for us all to see this in the case before us; yet how often, in our own experience, instead of waiting for the Lord to do what He has promised, we become tired of waiting, and try to do it for Him, and thus make failures.The Terms “Spiritual” and “Literal”
Years afterwards the promise was fulfilled in God’s own way, but it was not until both Abraham and his wife fully believed the Lord. “Through faith also Sarai herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged Him faithful who had promised.” (Hebrews 11:11) Isaac was the fruit of faith. “For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. But he who was of the bondwoman was born after flesh; but he of the freewoman was by promise.” (Galatians 4:22,23)The Spiritual is Real
Isaac was born after the Spirit, yet he was as real and literal a child as Ishmael was. So the true seed of Abraham are only those who are spiritual, but that does not make them any the less real. God is Spirit, yet He is a real God. Christ had a spiritual body after His resurrection, yet He was a real, literal being, and could be handled the same as other bodies. So the bodies of the saints after the resurrection will be spiritual, yet they will be real. Spiritual things are not imaginary things. Indeed, that which is spiritual is more real than that which is fleshly, because only that which is spiritual will endure for ever.All True Believers are Spiritual
From this case, therefore, we learn most conclusively that the seed which God promised to Abraham, which should be as the sand of the sea and the stars of heaven for number, and which should inherit the land, is a spiritual seed. That is, it is a seed which comes through the agency of the Spirit of God. The birth of Isaac, like that of the Lord Jesus, was miraculous. It was supernatural. Both were brought about through the agency of the Spirit. In both we have an illustration of the power by which we are to become sons of God, and thus heirs of the promise. For we, even now on this earth are to be wholly spiritual, otherwise we are not true children of God. Our everyday life of work and business is to be a spiritual life. “Ye are not in the flesh, but in the Spirit, if so be that the Spirit of Christ dwell in you.”What This Freedom Is
What this freedom is, the Lord showed in His talk to the Jews, recorded in the eighth of John. “If ye abide in My word, then are ye truly My disciples; and ye shall know the truth, and the truth shall make you free. They answered unto Him, We are Abraham’s seed, and have never yet been in bondage to any man; how sayest Thou, Ye shall be made free? Jesus answered them, Verily, verily, I say unto you, Every one that committeth sin is the bondservant of sin. And the bondservant abideth not in the house for ever; but the Son abideth for ever. If therefore the Son shall make you free, ye shall be free indeed.” (Galatians 4:31-36, R.V.) And later He declared to them that if they were really the children of Abraham, they would do the works of Abraham, verse 39.The Sum of the Matter
The sum of the whole matter is that in the promise to Abraham there is the Gospel, and only the Gospel; and any attempt to make the promises apply to any other than those who are Christ’s through the Spirit, is an attempt to nullify the promises of the Gospel of God. “If ye are Christ’s then are ye Abraham’s seed, and heirs according to the promise.” (Galatians 3:29) “Now if any man have not the Spirit of Christ, he is none of His.” (Romans 8:9) So if any man have not the Spirit of Christ, the Spirit by which Isaac was born, he is not a child of Abraham, and has no claim to any part of the promise. But as the inheritance is wholly a gift, and the Holy Spirit is the first-fruits or pledge of the inheritance, so the Spirit is freely given to all who believe; and with the Holy Spirit comes the righteousness of God.