"I have always been of the opinion, that the best way to arrive at truth, is to proceed by way of experiment and observation."

"The knowledge of the cause of things is a great part of philosophy."

"I have ever esteemed it a part of my duty to make the world acquainted with what I have done."

"The book of nature is a fine and large piece of clock-work."

"I have often observed that those who are most desirous of learning, are generally the most humble."