If a man has a diamond that has been examined by the lapidaries of the
world, and some ignorant stonecutter told him that it is nothing but
an ordinary rock, he laughs at him; but if it has not been examined
by lapidaries, and he is a little suspicious himself that it is not
genuine, it makes him mad. Any doctrine that will not bear investigation
is not a fit tenant for the mind of an honest man. Any man who is afraid
to have his doctrine investigated is not only a coward but a hypocrite.