3. So we have the climax of the story--faith rewarded. The first great lesson which the interposition of the Divine voice teaches us, is that obedience is complete when the inward surrender is complete. The outward act was needless. Abraham would have done no more if the flashing knife had buried itself in Isaac's heart. Here is the first great proclamation of the truth which revolutionises morality and religion, the beginnings of the teaching which culminates in the ethics of the Sermon on the Mount, and in the gospel of salvation, not by deeds, but through faith. The will is the man, the true action is the submission of the will. The outward deed is only the coarse medium through which it is made visible for men: God looks on purpose as performance. Again, faith is rewarded by God's acceptance and approval. 'I know that thou fearest God,' not meaning that He learned the heart by the conduct, but that, on occasion of the conduct, He breathes into the obedient heart that calm consciousness of its service as recognised and accepted by Him, which is the highest reward that His friend can know. 'To be well pleasing to Him' is our noblest aim, which, cherished, makes sacrifice sweet, and all difficult things easy. 'Nor know we anything more fair Than is the smile upon Thy face.' Again, faith is rewarded by a deeper insight into God's will. Much has been said about the sacrifice of Isaac in its bearing upon the custom of human sacrifice. We do not believe that Abraham was led to his act by a mistaken idea, borrowed from surrounding idolatries. His position as the sole monotheist amid these, the absence of evidence that human sacrifice was practised then among his neighbours, and, above all, the fact of the divine approval of his intention, forbid our acceptance of that theory. Nor can we regard the condemnation of such sacrifices as the main object of the incident. But no doubt an incidental result, and, we may perhaps say, a subsidiary purpose of it, was to stamp all such hideous usages with the brand of God's displeasure. The mode of thought which led to them was deeply rooted in the consciousness of the Old World, and corresponded to a true conception of the needs of humanity. The dark sense of sin, the conviction that it required expiation, and that procurable only by death, drove men to these horrid rites. And that ram, caught in the thicket, thorn-crowned and substituted for the human victim, taught Abraham and his sons that God appointed and provided a lamb for an offering. It was a lesson won by faith. Nor need we hesitate to see some dim forecast of the great Substitute whom God provided, who bears the sins of the world.