Experience is the only prophecy of wise men.

Every aquarium will eventually leak.

Anger begins in folly, and ends in repentance.

If you don't behave as you believe, you will end by believing as you behave.

What lies behind us and what lies ahead of us are tiny matters compared to what lives within us.

The only way to get the best of an argument is to avoid it.

It seems essential, in relationships and all tasks, that we concentrate only on what is most significant and important.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

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

No one can make you feel inferior without your consent.

One of the truest tests of integrity is its blunt refusal to be compromised.

We may encounter many defeats but we must not be defeated.

Nobody made a greater mistake than he who did nothing because he could do only a little.

The more that you read, the more things you will know. The more that you learn, the more places you'll go.

Think globally, act locally.

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.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

We are all born ignorant, but one must work hard to remain stupid

Everything excellent is as difficult as it is rare.

Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.

How often I found where I should be going only by setting out for somewhere else.