If you don't want to slip up tomorrow, speak the truth today.

Experience is the only prophecy of wise men.

Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.

Only idiots refuse to change their minds.

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

Life's battles don't always go to the stronger or faster man. But sooner or later, the man who wins is the man who thinks he can.

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

Nothing is so strong as gentleness, nothing so gentle as real strength

I've come to believe that all my past failure and frustration were actually laying the foundation for the understandings that have created the new level of living I now enjoy.

Every aquarium will eventually leak.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Wonder is the beginning of wisdom.

It is tact that is golden, not silence.

What's real and what's true aren't necessarily the same.

You laugh at me because I'm different, I laugh at you because you're all the same.

The object of the superior man is truth.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Never argue with an idiot. They drag you down to their level and then beat you with experience.

The weak can never forgive. Forgiveness is the attribute of the strong.

Drop the idea of becoming someone, because you are already a masterpiece. You cannot be improved. You have only to come to it, to know it, to realize it.

Intelligence is a moral category.