You believe with all your heart he can do it. I've seen you do it hundreds of times. The first is an intellectual belief, an acknowledgment of certain facts. The second is active faith, converting your knowledge to action. When you climb into the wheelbarrow, your belief in facts is converted into active trust.
Faith is knowledge in action.
It is active trust in the truth. You go to the airport. I believe it. I'll get on the plane. I'll invest myself in the things I believe to be true.