In this chapter, the Lord and 3 random men come hang out with Abraham who is a tremendous host. The Lord makes a comment about Sarah having a baby in a year and, not for nothing, Sarah thinks it’s a joke (she’s in her 90s). She does lie about it, but lying isn’t a big deal as seen in chapter 12. Then God withholds a little truth of his own from Abraham in a cheeky, fun way, but eventually Abraham gets the vibe that God is going to sweep away Sodom and Gomorrah. They have some fun negotiating (fun for Abraham, but tedious for God IF, and it’s a big if, he is all-knowing). Abraham doesn’t really know God because he thinks it’s far from him to kill people who are righteous for no reason. Arguably he’d have to kill everyone always because “every inclination of man’s heart is evil”.