Abraham left everything he knew and everyone he knew in search of God. God’s promise to him was, "I will lead you and bless you." In the NT He says, "I will never leave you or forsake you." We don’t have to understand everything in life or in God’s kingdom. God wants us to be willing to take leaps of faith in the fulfillment of our lives with him. When someone is willing to do that in the Bible, every time their lives were forever marked and changed and God used them to mark and change their generations for Him.