In keeping with the theme of the OP, here is a teaser for an excellent book/topic which many 'christians' would do well to ponder. I love how he labels it 'the idol of certainty'...
Faith isn't the absence of doubt--it's moving forward in spite of doubt.
Those who claim to 'know beyond the shadow of a doubt' the unknowable are dishonest and disillusioned. They have brainwashed themselves...
"There lives more faith in honest doubt, believe me, than in half the creeds" -- Tennyson