The first verse of this chapter says that 'the Lord appeared' unto Abraham, and then proceeds to tell that 'three men stood over against him,' thus indicating that these were, collectively, the manifestation of Jehovah. Two of the three subsequently 'went toward Sodom,' and are called 'angels' in chapter xix. 1. One remained with Abraham, and is addressed by him as 'Lord,' but the three are similarly addressed in verse 3. The inference is that Jehovah appeared, not only in the one 'man' who spake with Abraham, but also in the two who went to Sodom.
In this incident we have, first, God's communication of His purpose to Abraham. He was called the friend of God, and friends confide in each other. 'The secret of the Lord is with them that fear Him,' and it is ever true that they who live in amity and communion with God thereby acquire insight into His purposes. Even in regard to public or so-called 'political' events, a man who believes in God and His moral government will often be endowed with a 'terrible sagacity,' which forecasts consequences more surely than do godless politicians. In regard to one's own history, it is still more evidently true that the one way to apprehend God's purposes in it is to keep in close friendship with Him. Then we shall see the meaning of the else bewildering whirl of events, and be able to say, 'He that hath wrought us for the selfsame thing is God.' But the reason assigned for intrusting Abraham with the knowledge of God's purpose is to be noted. It was because of his place as the medium of blessing to the nations, and as the lawgiver to his descendants. God had 'known him,'--that is, had lovingly brought him into close relations with Himself, not for his own sake only, but, much more, that he might be a channel of grace to Israel and the world. His 'commandment' to his descendants was to lead to their worship of Jehovah and their upright living, and these again to their possession of the blessings promised to Abraham. That purpose would be aided by the knowledge of the judgment on Sodom, its source, and its cause, and therefore Abraham was admitted into the council-chamber of Jehovah. The insight given to God's friends is given that they may more fully benefit men by leading them into paths of righteousness, on which alone they can be met by God's blessings.
The strongly figurative representation in verses 20, 21, according to which Jehovah goes down to ascertain whether the facts of Sodom's sin correspond to the report of it, belongs to the early stage of revelation, and need not surprise us, but should impress on us the gradual character of the divine Revelation, which would have been useless unless it had been accommodated to the mental and spiritual stature of its recipients. Nor should it hide from us the lofty conception of God's long-suffering justice, which is presented in so childlike a form. He does 'not judge after ... the hearing of His ears,' nor smite without full knowledge of the sin. A later stage of revelation puts the same thought in language less strange to us, when it teaches that 'the Lord is a God of knowledge, and by Him actions are weighed,' and in His balances many a false estimate, both of virtuous and vicious acts, is corrected, and retribution is always exactly adjusted to the deed.
But the main importance of the incident is in the wonderful picture of Abraham's intercession, which, in like manner, veils, under a strangely sensuous representation, lofty truths for all ages. It is to be noted that the divine purpose expressed in 'I will go down now, and see,' is fulfilled in the going of the two (men or angels) towards Sodom; therefore Jehovah was in them. But He was also in the One before whom Abraham stood. The first great truth enshrined in this part of the story is that the friend of God is compassionate even of the sinful and degraded. Abraham did not intercede for Lot, but for the sinners in Sodom. He had perilled his life in warfare for them; he now pleads with God for them. Where had he learned this brave pity? Where but from the God with whom he lived by faith? How much more surely will real communion with Jesus lead _us_ to look on all men, and especially on the vicious and outcast, with His eyes who saw the multitudes as sheep without a shepherd, torn, panting, scattered, and lying exhausted and defenceless! Indifference to the miseries and impending dangers of Christless men is impossible for any whom He calls 'not servants, but friends.'