"If a man will not be a fool, he must not be a dogmatist."

"The more I study nature, the more I am amazed at the wisdom and power of God."

"It is a shameful thing for a Christian to be ignorant of the works of nature."

"I have often thought that the greatest wisdom consists in knowing our own ignorance."

"I have always been of the opinion, that the best way to understand the nature of things, is to examine them by experiments."