Can God depend on you? It is not a matter of what congregation you belong to, but we are called to belong to Christ. Philippians tells us that it is God working in us. We we were born again the old creature passed away and a new man was born.
God could depend on Abraham. Abram had to know who God was, making a decision to trust in God or not. When God called Abram to leave his family and everything that was familiar behind and go to a place that only God knew, Abram had to trust in God.