The first words of this lesson give the keynote for its meaning. 'God did prove Abraham'; the strange command was a test of his faith. In recent times the incident has been regarded chiefly as embodying a protest against child-sacrifices, and no doubt that is part of its intention, and their condemnation was part of its effect, but the other is the principal thing. Abraham, as the 'Father of the Faithful,' has his faith tested by a series of events from his setting out from Haran, and they culminate in this sharpest of all, the command to slay his son. The life of faith is ever a life of testing, and very often the fire that tries increases in heat as life advances. The worst conflicts are not always at the beginning of the war.
Our best way of knowing ourselves is to observe our own conduct, especially when it is hard to do nobly. We may easily cheat ourselves about what is the basis and ruling motive of our lives, but our actions will show it us. God does not 'test' us as if He did not know what was gold and what base metal, but the proving is meant to make clear to others and ourselves what is the worth and strength of our religion. The test is also a means of increasing the faith which it demonstrates, so that the exhortation to 'count it all joy' to have faith tried is no overstrained counsel of perfection.
The narrative plainly declares that the command to sacrifice his son was to Abraham unmistakably divine. The explanation that Abraham, living beside peoples who practised child-sacrifice, heard but the voice of his own conscience asking, 'Canst thou do for Jehovah what these do for Moloch?' does not correspond to the record. No doubt God does speak through conscience; but what sent Abraham on his terrible journey was a command which he knew did not spring up within, but came to him from above. We may believe or disbelieve the possibility or the actuality of such direct and distinguishable commands from God, but we do not face the facts of this narrative unless we recognise that it asserts that God made His will known to Abraham, and that Abraham knew that it was God's will, not his own thought.
But is it conceivable that God should ever bid a man commit a crime? To the question put in that bald way, of course there can be but one answer, No. But several conditions have to be taken into account. First, it is conceivable that God should test a man's willingness to surrender what is most precious to him, and what all his hopes are fixed on; and this command was given with the purpose that it should not be obeyed in fact, if the willingness to obey it was proved. Again, the stage of development of the moral sense at which Abraham stood has to be remembered. The child-sacrifices around him were not regarded as crimes, but as worship, and, while his affections were the same as ours, and his father's heart was wrung, to slay Isaac did not present itself to him as a crime in the way in which it does so to us. God deals with men on the moral and spiritual level to which they have attained, and, by descending to it, raises them higher.
The purpose of the command was to test faith, even more than to test whether earthly love or heavenly obedience were the stronger. There is a beautiful and instructive climax in the designations of Isaac in verse 2, where four times he is referred to, 'thy son, thine only son,' in whom all the hopes of fulfilment of the divine promise were concentrated, so that, if this fruit from the aged tree were cut off, no other could ever grow; 'whom thou lovest,'--there the sharp point pierces the father's heart; 'even Isaac,' in which name all the ties that knit him to Abraham are gathered up. Each word heightens the greatness of the sacrifice demanded, and is a fresh thrust of the dagger into Abraham's very life. Each suggests a reason for not slaying Isaac, which sense might plead. God does not hide the painfulness of surrender from us. The more precious the treasure is, the more are we bound to lay it on the altar. But it was Abraham's faith even more than his love that was tested. The Epistle to the Hebrews lays hold on this as the main element in the trial, that he who 'had received the promises' was called to do what seemed to blast all hope of their being fulfilled. What a cruel position to have God's command and God's promise apparently in diametrical opposition! But faith loosened even that seemingly inextricable tangle of contradiction, and felt that to obey was for man, and to keep His promise was for God. If we do our duty, He will see to the consequences. 'Tis mine to obey; 'tis His to provide.'