God’s purposes for His people are not conditional on their performance. The sins of our parents do not determine God’s presence and loving actions in our lives. God is sovereign and unrestrained by us. God’s ability to use even our own sins for his own purposes shows that he doesn’t love us simply for the great things we can do for him. Often, we think that God will love us more if we do great things for him. But the story of Abraham and Sarah (and the whole bible) shows us that God’s love is unconditionally based on His sovereign purposes.