Where knowledge ends, religion begins.

In the hands of a genius, engineering turns to magic, philosophy becomes poetry, and science pure imagination.

Expediency is a law of nature. The camel is a wonderful animal, but the desert made the camel.

Increased means and increased leisure are the two civilizers of man.

The fruit of my tree of knowledge is plucked, and it is this: “Adventures are to the adventurous.”

Moderation has been called a virtue to limit the ambition of great men, and to console undistinguished people for their want of fortune and their lack of merit.

The art of governing mankind by deceiving them.