v1: The Lord appears again to Abraham; 12.7; 13.3-4; 15.1; 17.1; here is a man available and alert, looking for the coming of the Lord. He has a constant expectation that God has things to say to him, and a work for him to do. In the heat of the day, when many rested, it was an inconvenient time to receive visitors, but Abraham shows respect and hospitality.
v2: Abraham hurries to meet the three men, to greet and receive them to his home. 19.1 indicates that there are two angels accompanying the Lord.
Abraham hurries to speak with Sarah (v6), he hurries to choose a calf (v7), and his young men hurry to prepare it.
v3: "My lord," for Abraham recognises that these are no ordinary guests.
v4-8: Abraham is pleased to be able to serve his visitors.
v9-15: At the appointed time; God's promises to Abraham and Sarah will be fulfilled in His time (17.21). Even Sarah's unbelief cannot prevent God's plan, for the promise is unconditional.
‘Thus, you see what virtue there is in an absolute promise; it carries enough in its own bowels to accomplish the thing promised, whether there be means or not in us to effect it.’ (John Bunyan; Come and welcome to Jesus Christ.)
v16-19: The scene changes; the Lord is with Abraham overlooking Sodom and Gomorrah. Abraham is the Friend of God, Is 4.18; John 15.15. He is made aware of God's plan to destroy the cities. Many of God's works are kept secret from men; we should not expect otherwise.
"I have chosen him," for there is a relationship between God and Abraham, initiated by God. He has a great purpose for that relationship, to have obedient offspring, and enjoy the promises of God.
v20-21: God sees man's sin. The words here do not indicate His ignorance of their sins; they are the words of a judge examining the case before pronouncing judgment.
Here God acts, as at Babel, when that sin becomes so bad; He alone can decide when and if to do this. Although God's character and standards have not changed, later He gives the law to restrain man's sin, and later still Christ came to put an end to sin. He is full of grace and truth, as through Christ God overlooks transgressions. How merciful that His righteous anger is not revealed in such a way in today's cities. Here, as now, God is long-suffering, giving sinful man an opportunity to repent.
v22: Abraham is aware of what it about to happen, and stands before the Lord; perhaps he is weighing up his response. Would we be more careful in our prayers if we were more conscious of the Lord's presence?
v23-25: Abraham draws near and prays, having confidence in the character of God. No action of His can be inconsistent with His character; He will always do what is right.
v26-33: Abraham's persistent prayer, but with respect; no flippancy nor complacency. Abraham learns, through this experience, how merciful God is,