Why did God command Abraham to sacrifice Isaac?

"And it came to pass after these things that God did tempt Abraham, and said unto him, Abraham; and he said, Behold, here I am. And he said, Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt-offering upon one of the mountains which I will tell thee of." It was the greatest trial to which God had ever put the heart of a saint. It was not tempting with evils any more than God is tempted with them. It was, on the contrary, His own good that was before God, who would make His friend the witness of it, while testing his confidence in Himself and His word to the uttermost. Isaac was loved as only a child so promised, born and reserved for a wondrous destiny, could be — to say nothing of personal qualities that must endear him to his parents. How the father's heart must have pondered on God's covenant with "thee, and thy seed after thee in their generations, for an everlasting covenant," and the land of Canaan for an everlasting possession; especially after Hagar and Ishmael were expelled, and the word of promise came, "In Isaac shall thy seed be called!" The father was assured therefore that this son, and no other, was that of the promises. God could not lie; but He might and does try, and those most whom He loves best. So with Abraham now. God demands that the father shall offer up his only son for a burnt-offering on Mount Moriah. It was the shadow of His own incomparable and infinite gift, but only the shadow; for Christ really did suffer and die, and God the Father sent Him, in divine love, to be thus a propitiation for our sins.

When God tempted Abraham in the matter of offering up his son Isaac, God was not tempting him with evil, for God had a right to ask of him what He asked. God is the Giver of life and he can demand back what He gives. Genesis 22:1 is the very first mention in the Bible of the word tempt (Hebrew, nasah, to try, to prove).

Even to the most excellent of God's saints this exercise of conscience and heart cannot be spared. Abraham's heart, as another has observed, certainly was grieved at the loss of Ishmael, but his conscience in that case had to say to him. It was very different when Isaac had to be sacrificed. There Abraham's conscience did not speak, but his heart all the more. God was trying his heart, whether it rested more in the gift than in the Giver. Abraham stood the test. Jacob had to endure years of trials during his service with Laban; but his conscience could but remind him that his sufferings were deserved, and that he was only reaping what he had sown. His grief at the loss of Joseph was quite another thing, for in that case his heart had far more to say than his conscience.

Abraham is now in a fit moral position to have his heart put to a most severe test. The long-cherished reserve being put forth from his heart, in Gen. 20 — the bond-woman and her son being put forth from his house, as in Gen. 21, he now stands forth in the most honoured position in which any soul can be placed, and that is a position of trial from the hand of God Himself. There are various kinds of trial — trial from the hand of Satan; trial from surrounding circumstances; but the highest character of trial is that which comes directly from the hand of God, when He puts His dear child into the furnace for the purpose of testing the reality of his faith. God will do this: He must have reality. It will not do to say "Lord, Lord," or, "I go, sir." The heart must be probed to the very bottom, in order that no element of hypocrisy, or false profession, may he allowed to lodge there. "My son, give me thine heart." He does not say, "give me thine head, or thine intellect, or thy talents, or thy tongue, or thy money;" but "give me thine heart:" and in order to prove the sincerity of our response to this gracious command, He will lay His hand upon something very near our hearts. Thus he says to Abraham, "Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah, and offer him there for a burnt-offering, upon one of the mountains which I will tell thee of." This was coming very close to Abraham's heart. It was passing him through a searching crucible indeed. God "requires truth in the inward parts." There may be much truth on the lips, and much in the intellect, but God looks for it in the heart. It is no ordinary proof that will satisfy God, as to the love of our hearts. He Himself did not rest satisfied with giving an ordinary proof. He gave His Son, and we should aim at giving very striking proofs of our love to Him who so loved us, even when we were dead in trespasses and sins.

However, it is well to see that God confers a signal honour upon us when He thus tests our hearts. We never read that "the Lord did tempt Lot." No; Sodom tempted Lot. He never reached a sufficiently high elevation to warrant his being tried by the hand of Jehovah. It was too plainly manifest that there was plenty between his heart and the Lord, and it did not, therefore, require the furnace to bring that out. Sodom would have held out no temptation whatever to Abraham. This was made manifest in his interview with Sodom's king, in chapter 14. God knew well that Abraham loved him far better than Sodom; but He would make it manifest, that He loved him better than any one or anything, by laying his hand upon the nearest and dearest object. "Take now thy son, thine only son, Isaac." Yes, Isaac, the child of promise; Isaac, the object of long-deferred hope, the object of parental love, and the one in whom all the kindreds of the earth were to be blessed. This Isaac must be offered as a burnt-offering. This, surely, was putting faith to the test, in order that, being more precious than gold that perishes, though it be tried with fire, it might be found to praise, and honour, and glory. Had Abraham's whole soul not been stayed simply on the Lord, he never could have yielded unhesitating obedience to such a searching command. But God Himself was the living and abiding support of his heart, and therefore he was prepared to give up all for Him.

Now, the test to which God submits Abraham — the furnace in which He tries him, marks at once a pure and genuine metal. Had Abraham's faith not been of the purest and most genuine character, he would assuredly have winced under the fiery ordeal through which we behold him passing in this beautiful chapter. When God promised Abraham a son, he believed the promise "and it was counted to him for righteousness." "He staggered not at the promise of God through unbelief, but was strong in faith, giving glory to God." But then, having received this son, having realised the truth of the promise, was there not a danger that he would rest in the gift instead of in the Giver? Was there not a danger that he would lean upon Isaac, in thinking upon the future seed and future inheritance, rather than upon God Himself who had promised him the seed? Surely there was; and God knew that, and therefore tries His servant in a way, more than anything, calculated to put him to the test as to the object on which his soul was resting. The grand inquiry put to Abraham's heart, in this wondrous transaction, was, "are you still walking before the Almighty God, the Quickener of the dead?" God desired to know whether he could apprehend in Him the One who was as able to raise up children from the ashes of his sacrificed son as from the dead womb of Sarah. In other words, God desired to prove that Abraham's faith reached forth, as some one has observed, to resurrection, for if it stopped short of this, he never would have responded to the startling command, "Take now, thy son, thine only son Isaac whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt-offering upon one of the mountains which I will tell thee of." (Gen. 22:2) But Abraham "staggered not." He at once responds to the call. God had asked for Isaac, and Isaac must be given, and that too without a breath of murmur. He could give up anything or everything so long as his eye rested upon "the Almighty God." And mark the point of view in which Abraham puts this journey of his to Mount Moriah, "I and the lad will go yonder and worship." Yes, it was an act of worship, for he was about to lay upon the altar of the Quickener of the dead the one in whom all God's promises centred. It was an act of worship — most elevated worship, for he was about to prove, in the sight of Heaven and hell, that no other object filled his soul but the Almighty God. Hence, what calmness! what self-possession! what pure devotion! what elevation of mind! what self-renunciation! He never falters throughout the scene. He saddles the ass, prepares the wood, and sets off to Mount Moriah, without giving expression to one anxious thought, although, as far as human eye could see, he was about to lose the object of his heart's most tender affection, yea, the one upon whom the future interests of his house, to all appearance, depended.

God now tested Abraham. True faith has to be tested; it is an evidence that there is faith when tests come upon the believer. God knew Abraham, and when the proper moment had come in his life, God spake the words to him by which he was to be tested. What a test it was! That promised son, that beloved one to take him and to slay him upon an altar! Reason might have said, God promised this son, he was given by God's own power, all my hope and expectation center in him; how can God demand him to be slain? But faith does not question God's Word, and has no "why?" to ask of God. Such faith was manifested by Abraham when in the beginning God told him to go out of his land, to a land that He would show him. He went out in faith and knew not whither he went. But God brought him to the land. He knew God's faithfulness. And now once more he is asked to go out, to the land of Moriah to an unknown mountain, and to take his beloved son along to give him up. Was his heart really all for God? Does he love Him and depend on Him supremely? Would he be willing to part with the only one and give him up? This is the test. The record shows there was not a moment's hesitation on Abraham's side. No word escaped from his lips. The only answer which he gave to God was that he rose up early in the morning and began at once the journey with Isaac. What an obedience it was!

Then Abraham took the knife, being prepared to fully carry out what God had told him, in actually killing his beloved son (v.10). At this crucial moment he was interrupted by the urgent voice of the angel of God calling him by name. How great must have been his relief, and that of Isaac too, when he is told to do nothing to the lad. Then it is made clear to him that this was "only a test," the trial of his faith, which is "much more precious than of gold that perishes" (1 Peter 1:7). The reality of Abraham's faith had been proven, and the trial must end before Isaac is actually sacrificed. Yet this historical record is inscribed in the word of God for eternity, not only as a commendation of genuine, unquestioning faith, but as a striking picture of the Father sacrificing His Son.

But also the Lord has a substitute for Isaac ready at that very spot. He cause Abraham to look behind him, where a ram was caught in a thicket by his horns (v.13). How a domesticated animal came to be there we do not know, except that God led it there. At least Abraham recognized it as an acceptable offering and offered it to God as a burnt offering instead of his son. Isaac would surely be thankful for such a substitute, just as believers today thank God for the Lord Jesus and His great substitutionary work at Calvary for our sakes.

Then Abraham took the knife, being prepared to fully carry out what God had told him, in actually killing his beloved son (v. 10). At this crucial moment he was interrupted by the urgent voice of the angel of God calling him by name. How great must have been his relief, and that of Isaac too, when he is told to do nothing to the lad. Then it is made clear to him that this was “only a test,” the trial of his faith, which is “much more precious than of gold that perishes” (1 Peter 1:7). The reality of Abraham's faith had been proven, and the trial must end before Isaac is actually sacrificed. Yet this historical record is inscribed in the word of God for eternity, not only as a commendation of genuine, unquestioning faith, but as a striking picture of the Father sacrificing His Son.

But also the Lord has a substitute for Isaac ready at that very spot. He caused Abraham to look behind him, where a ram was caught in a thicket by his horns (v. 13). How a domesticated animal came to be there we do not know, except that God led it there. At least Abraham recognized it as an acceptable offering and offered it to God as a burnt offering instead of his son. Isaac would surely be thankful for such a substitute, just as believers today thank God for the Lord Jesus and His great substitutionary work at Calvary for our sakes.

A famine in the land may have been a severe trial for Abraham, but it was not to be compared with the severity of the test for his faith when God said to him, “Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of” (Gen. 22:2). The famine had to do with the needs of the body, but now it was the tenderest affections of the patriarch that were touched, and God showed Abraham that He was aware of this when He spoke of “thy son, thine only son Isaac, whom thou lovest.” Abraham was now called upon to give up the son of his love in whom all his hopes were centred for the fulfilment of the promises of God.

After these things, and quite distinct from them, God tried Abraham. What is not here for God as well as man! It is the picture, which blind unbelief alone fails to see, of the Only-begotten Son given, of the Lamb which God would provide Himself for a Burnt Offering. Here Isaac gave himself up to die, as Abraham was ready at God's word to sacrifice his beloved son: the sign of a far better thing.