There is a drought, but God promises he will provide for Isaac. Isaac has enough faith to stay where he is, but not enough to believe God will protect him from those who would want Isaac’s wife. It’s interesting that Isaac repeats the same lie his father Abraham did. God does provide for Isaac’s protection and water needs, and people can tell Isaac is being taken care of by God.
Just like Abraham and Isaac, you probably have faith in God sometimes but sometimes take things into your own hands. When we have faith in God, it allows those around us to recognize that God is at work.