Most of us believe that a weak faith is a doubting faith, but maybe it is not. Perhaps a weak faith is one that must be propped up by certainty.
If we have evidence for the things we believe, is it really faith? If we demand proof of the existence of God, is it really belief?
Maybe one day science will prove God, and one day I will see Him face to face, but in the meantime my faith will be seasoned with a little bit of doubt. I believe that is healthy faith.