The most courageous act is still to think for yourself. Aloud.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

Men are not prisoners of fate, but only prisoners of their own minds.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

There are things known and there are things unknown, and in between are the doors of perception.

I dream. Sometimes I think that's the only right thing to do.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.

There are four ways, and only four ways, in which we have contact with the world. We are evaluated and classified by these four contacts: what we do, how we look, what we say, and how we say it.

Judge not unless you judge yourself.

To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.

Your reputation is in the hands of others. That's what the reputation is. You can't control that. The only thing you can control is your character.

The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends, and where the other begins?

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

Happiness is not an ideal of reason, but of imagination.

I hear and I forget. I see and I remember. I do and I understand.

Wisdom begins at the end.

The one you buy will be the only one that doesn't work.

Rest satisfied with doing well, and leave others to talk of you as they please.

If you don't know where you're from, you'll have a hard time saying where you're going.

You can best serve civilization by being against what usually passes for it.

Science is organized knowledge. Wisdom is organized life.