"The world is a great machine, and man is a curious observer of its workings."

"The knowledge of nature is the knowledge of God's works."

"I have seen a dog, whose hind legs were cut off, and yet it lived for a considerable time."

"I have always looked upon the study of nature as a delightful and profitable employment."

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