He who wishes to serve his country must have not only the power to think, but the will to act

A tyrant... is always stirring up some war or other, in order that the people may require a leader.

When the mind is thinking it is talking to itself.

More will be accomplished, and better, and with more ease, if every man does what he is best fitted to do, and nothing else.

Socrates said that, from above, the Earth looks like one of those twelve-patched leathern balls.

The wisdom of men is worth little or nothing.

A wise ignorance is an essential part of knowledge.