"I am about to take leave of this earth, and I can say that I have seen more wonders than any man before me."

"The greatest wisdom is to know oneself."

"It is a false and dangerous opinion that the authority of Scripture should be preferred to the authority of reason."

"By denying scientific principles, one may maintain any paradox."

"It is a great error to believe that the truths of faith are in any way contrary to the truths of reason."