Gen 15:1-3, 3 And Abram said, “Behold, you have given me no offspring, and a member of my household will be my heir.”
Abram had 2 brothers Nahor and Haran. Nahor had 3 children and Haran had 1 child named Lot. Abram on the other hand was childless, his wife was barren (Gen 11). After Haran died, Abram took Lot and he became a father to him (his nephew, Gen 13:2). God instructed Abram to leave his father’s house to a land He would show him. After years of Abram traveling and gathering, Lot was now a grown man, rich as Abram was. Their increase forced them to break ties and go their separate ways, but then, “14 The Lord said to Abram, after Lot had separated from him, “…15 …all the land that you see I will give to you and to your offspring forever.” (Gen 13:14-15).
The timing is intriguing. As long as Lot was with him, Abram was content to go childless especially with their condition. Lot was the son he never had. He had no need for holy discontentment until the Lord’s promise awakened it. He later reminded the Lord for his own sake that all the riches were meaningless if he had no child to inherit. For him to be the father of faith, he needed something that defied all the logics and reasons and that was to trust God for a son at the age of 75 with a barren wife past the age of child bearing. Gen 15:6 ”And he believed in the LORD, and He accounted it to him for righteousness”. To believe God for the impossible, He must put that holy discontentment to awaken us and serve as a purpose for our praying and believing. If you lack it, why not ask for an Isaac especially now if the last few years you have been content with Lot.