Faith consists in believing what reason cannot.

Perhaps, if I use my reason in good faith, I may suceed in discovering some ray of probability to lighten me in the dark night of nature. And if this faint dawn which I seek does not come to me, I shall be consoled to think that my ignorance is invincible; that knowledge which is forbidden me is assuredly useless to me; and that the great Being will not punish me for having sought a knowledge of him and failed to obtain it.

It is given to us to calculate, to weigh, to measure, to observe, this is natural philosophy; almost all the rest is chimera.

Many are destined to reason wrongly; others, not to reason at all; and others, to persecute those who do reason.