Good means not merely not to do wrong, but rather not to desire to do wrong.

Courage, above all things, is the first quality of a warrior.

The pendulum of the mind oscillates between sense and nonsense, not between right and wrong.

What you're thinking is what you're becoming.

If I speak of myself in different ways, that is because I look at myself in different ways.

Simplicity is the ultimate sophistication.

If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.

It is man that makes truth great, not truth that makes man great.

The oldest, shortest words- 'yes' and 'no'- are those which require the most thought.

Things which matter most must never be at the mercy of things which matter least.

There are no eternal facts, as there are no absolute truths.

Be silent or let thy words be worth more than silence.

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.

Circumstances do not make a man, they reveal him.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

The best revenge is to be unlike him who performed the injury.

Medicine heals diseases of the body, wisdom frees the soul from passions.

If you do what you've always done, you'll get what you've always gotten.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.

Respect yourself if you would have others respect you.