When the devil wants to cause offense against the true doctrine and faith, he does not do so through insignificant people, who do not rate highly with the world, but through those who are the very best, the wisest, the holiest, and the most learned.
Martin LutherWhere faith is not continually kept in motion and exercised, it weakens and decreases, so that it must indeed vanish; and yet we do not see nor feel this weakness ourselves, except in times of need and temptation, when unbelief rages too strongly; and yet for that very reason faith must have temptations in which it may battle and grow.
Martin Luther