From one point of view, the all-important view-point here, it mattered not what Abraham's conduct had been. As a fact, he was already devout when the incident of Gen. xv. occurred. But he was also actually a sinner; _that_ is made quite plain by Gen. xii., the very chapter of the Call. And potentially, according to Scripture, he was a great sinner; for he was an instance of the human heart. But this, while it constituted Abraham's urgent need of acceptance, was not in the least a barrier to his acceptance, when he turned from himself, in the great crisis of absolute faith, and accepted God in His promise.
The principle of the acceptance of "the Friend" was identically that which underlies the acceptance of the most flagrant transgressor. As St Paul will soon remind us, David in the guilt of his murderous adultery, and Abraham in the grave walk of his worshipping obedience, stand upon the same level here. Actually or potentially, each is a great sinner. Each turns from himself, unworthy, to God in His promise. And the promise is his, not because his hand is full of merit, but because it is empty of himself.
It is true that Abraham's justification, unlike David's, is not explicitly connected in the narrative with a moral crisis of his soul. He is not depicted, in Gen. xv., as a conscious penitent, flying from justice to the Judge. But is there not a deep suggestion that something not unlike this did then pass over him, and through him? That short assertion, that "he trusted the LORD, and He counted it to him for righteousness," is an anomaly in the story, if it has not a spiritual depth hidden in it. Why, just then and there, should we be told this about his acceptance with God? Is it not because the vastness of the promise had made the man see in contrast the absolute failure of a corresponding merit in himself? Job (xlii. 1-6) was brought to self-despairing penitence not by the fires of the Law but by the glories of Creation. Was not Abraham brought to the same consciousness, whatever form it may have taken in his character and period, by the greater glories of the Promise? Surely it was there and then that he learnt that secret of self-rejection in favour of God which is the other side of all true faith, and which came out long years afterwards, in its mighty issues of "work," when he laid Isaac on the altar.[46]
It is true, again, that Abraham's faith, his justifying reliance, is not connected in the narrative with any articulate expectation of an atoning Sacrifice. But here first we dare to say, even at the risk of that formidable charge, an antique and obsolete theory of the Patriarchal creed, that probably Abraham knew much more about the Coming One than a modern critique will commonly allow. "He rejoiced to see My day; and he saw it, and was glad" (John viii. 56). And further, the faith which justifies, though what it touches in fact is the blessed Propitiation, or rather God in the Propitiation, does not always imply an articulate knowledge of the whole "reason of the hope." It assuredly implies a true submission to _all that the believer knows_ of the revelation of that reason. But he may (by circumstances) know very little of it, and yet be a believer. The saint who prayed (Psal. cxliii. 2) "Enter not into judgment with Thy servant, O Lord, for in Thy sight shall no man living be justified," cast himself upon a God who, being absolutely holy, yet can somehow, just as He is, justify the sinner. Perhaps he knew much of the reason of Atonement, as it lies in God's mind, and as it is explained, as it is demonstrated, in the Cross. But perhaps he did not. What he did was to cast himself up to the full light he had, "without one plea," upon his Judge, as a man awfully conscious of his need, and trusting only in a sovereign mercy, which _must_ also be a righteous, a law-honouring mercy, because it is the mercy of the Righteous Lord.