“Now the Lord appeared to him by the oaks of Mamre, while he was sitting at the tent door in the heat of the day. When he lifted up his eyes and looked, behold, three men were standing opposite him…He said, ‘I will surely return to you at this time next year; and behold, Sarah your wife will have a son’…Then the men rose up from there, and looked down toward Sodom; and Abraham was walking with them to send them off. The Lord said, ‘Shall I hide from Abraham what I am about to do, since Abraham will surely become a great and mighty nation, and in him all the nations of the earth will be blessed?…Then the men turned away from there and went toward Sodom, while Abraham was still standing before the Lord. Abraham came near and said, ‘Will You indeed sweep away the righteous with the wicked?… Shall not the Judge of all the earth deal justly?’” (Genesis 18:1-2,10,16-18,22-23,25, NASB).
Genesis 18 is a critical juncture, a pivotal point, in biblical history in my view. It’s a theological nexus that reveals the link between God’s mercy and wrath, between human rebellion and redemption. And it does so in a most dramatic and memorable way. Three defining moments occur in this chapter that reinforce the interaction between mercy and wrath, rebellion and redemption: 1) the announcement of the birth of Isaac; 2) the plan to destroy Sodom and Gomorrah; and 3) God’s restraint for Lot and his family.