It seems Mother Teresa of Calcutta had doubts and questions about her faith, which is not a bad, but a good, thing. We need to honor that. Only way to grow! To me the opposite of faith is also making an idol of being absolutely sure (which comes out of fear and ignorance).
"So keep fightin' for freedom and justice, beloveds, but don't you forget to have fun doin' it. Lord, let your laughter ring forth. Be outrageous, ridicule the fraidy-cats, rejoice in all the oddities that freedom can produce. And when you get through kickin' ass and celebratin' the sheer joy of a good fight, be sure to tell those who come after how much fun it was." - Molly Ivins 1944-2007