q.d. Seeing I have done greater things for him, how can I deny him the less? Compare the argument, Romans 8:32. God's ways are not like men's ways. Former favours to men are arguments why they should do no more, but to God they are motives for the adding of new ones.
Related Commentaries of Genesis 18:18
Genesis 18:18
18 Seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him?