with which we work upon truth, even in the strongest men, are feeble
and inadequate to their tremendous task.

And in the fourth place, ALL RELIGIOUS TRUTHS ARE DOUBTABLE. There
is no absolute truth for any one of them. Even that fundamental
truth--the existence of a God--no man can prove by reason. The
ordinary proof for the existence of a God involves either an
assumption, argument in a circle, or a contradiction. The impression
of God is kept up by experience, not by logic. And hence, when
the experimental religion of a man, of a community, or of a nation
wanes, religion wanes--their idea of God grows indistinct, and that
man, community or nation becomes infidel.

Bear in mind, then, that all religious truths are doubtable--even
those which we hold most strongly.

What does this brief account of the origin of doubt teach us? It
teaches us

Great intellectual humility.

It teaches us sympathy and toleration with all men who venture upon
the ocean of truth to find out a path through it for themselves.
Do you sometimes feel yourself thinking unkind things about your
fellow-students who have intellectual difficulty? I know how hard
it is always to feel sympathy and toleration for them; but we must
address ourselves to that most carefully and most religiously. If
my brother is short-sighted I must not abuse him or speak against
him; I must pity him, and if possible try to improve his sight, or
to make things that he is to look at so bright that he cannot help