The New Gospel

Suppose an individual believes something with his whole heart; suppose further that he has a commitment to this belief, that he has taken irrevocable actions because of it; finally, suppose he is presented with evidence, unequivocal and undeniable evidence, that his belief is wrong: what will happen?  The individual will frequently emerge, not only unshaken, but even more convinced of the truth of his beliefs than ever before.  Indeed, he may even show a new fervor about convincing and converting other people to his view.