Genesis 22:9

After many a weary step, and with a heavy heart, he arrives at length at the fatal place; builds the altar, an altar of earth, we may suppose, the saddest that ever he built; lays the wood in order for Isaac's funeral pile; and now tells him the amazing news. Isaac, for aught that appears, is as willing as Abraham; we do not find that he made any objection against it. God commands it to be done, and Isaac has learned to submit. Yet it was necessary that a sacrifice should be bound; the great Sacrifice, which, in the fulness of time, was to be offered up, must be bound, and therefore so must Isaac. Having bound him, he lays him upon the altar, and his hand upon the head of the sacrifice. Be astonished, O heavens, at this, and wonder, O earth! here is an act of faith and obedience which deserves to be a spectacle to God, angels, and men; Abraham's darling, the church's hope, the heir of promise, lies ready to bleed and die by his own father's hands! Now this obedience of Abraham in offering up Isaac is a lively representation, 1st, Of the love of God to us, in delivering up his only begotten Son to suffer and die for us, as a sacrifice. Abraham was obliged, both in duty and gratitude, to part with Isaac, and parted with him to a friend, but God was under no obligations to us, for we were enemies. 2d, Of our duty to God in return for that love; we must tread in the steps of this faith of Abraham. God, by his word, calls us to part with all for Christ, all our sins, though they have been as a right hand, or a right eye, or an Isaac; all those things that are rivals with Christ for the sovereignty of our hearts; and we must cheerfully let them all go. God, by his providence, which is truly the voice of God, calls us to part with an Isaac sometimes, and we must do it by a cheerful resignation and submission to his holy will.