i'd give going bananas the best answer because that answer is the truth.
no matter what mankinds track record is with religion - even to those who do not believe in christs existence the teachings of christ are undeniable, and to deny his teachings shows a defectiveness of the denier (denial of the truth is also the same as insanity)... or to put it plain and simple - sin - which we all do have, the thing is accepting that we do have sin just as we accept the teachings as the way and the word.