If triangles had a god, he would have three sides.

Liberty is the right to do what the law permits.

It is unreasonable ... to oblige a man not to attempt the defense of his own life.

The success of most things depends upon knowing how long it will take to succeed.

I never listen to calumnies, because if they are untrue I run the risk of being deceived, and if they be true, of hating persons not worth thinking about.

They who love to inform themselves, are never idle. Though I have no business of consequence to take care of, I am nevertheless continually employed. I spend my life in examining things: I write down in the evening whatever I have remarked, what I have seen, and what I have heard in the day: every thing engages my attention, and every thing excites my wonder: I am like an infant, whose organs, as yet tender, are strongly affected by the slightest objects.

To become truly great, one has to stand with people, not above them.