After God’s promises to Abraham last week, we expect chapter 18 to be the birth of Isaac. But, it is not. Lot enters the picture again and will be the main focus of the next two chapters. (Remember he has moved into the wicked city of Sodom.) But God, in his great love and mercy, initiates contact again with Abraham and Sarah. They’ve done nothing to deserve all this attention. Yet, God continues to initiate. And, in this week’s text, he initiates contact disguised as strangers, even angels. How will Abraham and Sarah respond this time? Both of their responses become quite instructive for us. But, through it all, we continue to learn about God and his character.