"I have a peculiar aversion to controversies, which often generate more heat than light."

"I have often been surprised to find how little care men take to preserve their health, and how much they neglect their souls."

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

"The more accurately we know the properties of things, the better we can employ them."

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