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

Travel teaches toleration.

Demagogues and agitators are very unpleasant, they are incidental to a free and constitutional country, and you must put up with these inconveniences or do without many important advantages.

What we call public opinion is generally public sentiment.

He was one of these men who think that the world can be saved by writing a pamphlet.

What are the most brilliant of our chymical discoveries compared with the invention of fire and the metals?

The most dangerous strategy is to jump a chasm in two leaps.