He brought me out of the idolatry of my father's house. He led me on an adventure into a new land. He made a promise to me of offspring that cannot be numbered. He brought about the miracle of conception and birth for me and my wife in our old age. So, faith reviews the promises.
Faith reviews the covenant.
The conclusion of this reasoning is that God must have a plan. And God did have a plan. It's almost like an algebra problem where you discover the value of X because of what you already know. This is faith thinking in testing times. Therefore, if I offer him up to God, God must have a plan for bringing him back.