If you're reading this, odds are that you are sitting down on something. Even if you're standing, at some point you sit down on something. When you did, did you think about the seat? Did you look down at it and wonder if it would hold you? Did you worry that it wouldn't support you? Did you consider that it might break and you would fall down?
Chances are that you answered no to all of these questions. You had complete confidence in the chair and faith that it would do what it was supposed to do. Because that chair had supported you before or even looked like it would, you believed in it's ability.
Why do we doubt God? How many times to we wonder "Is He going to take care of me?" "Will he actually help me out of this?" "Can I really count on Him?" Despite all evidence to the contrary we doubt God's ability to do what He says He will do. Despite all of the times that He has helped us in the past, we wrestle with whether or not He will help us in the future.
So tell me, which do you have more faith in. God or your chair?