Here's another quote from C.S. Lewis.
You never know how much you really believe anything until its truth or falsehood becomes a matter of life and death. It is easy to say you believe a rope to be strong as long as you are merely using it to cord a box. But suppose you had to hang by that rope over a precipice. Wouldn't you then first discover how much you really trusted it?
C. S. Lewis, "A Grief Observed"
I think this is one of the reasons why I love the faith of the Ugandans so much. We don't think we need God as much as the Ugandans. For the many Ugandan Christians I have come to love, when they pray, "Give us this day our daily bread," this is not a figurative statement. God must send the rain to grow the crops, and God must help the crops to grow. Their day to day life is dependent on God.
That's why until you and I have been in a place where we were totally helpless and dependent on God, our faith will always remain shallow.