As our case is new, we must think and act anew.

Having a great intellect is no path to being happy.

Good advice is always certain to be ignored, but that's no reason not to give it.

Nothing is as easy as it looks.

Every aquarium will eventually leak.

The lie is a condition of life.

The greatest deception men suffer is from their own opinions.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.

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

Where wisdom reigns, there is no conflict between thinking and feeling.

Time wounds all heels.

All differences in this world are of degree, and not of kind, because oneness is the secret of everything.

Nothing is softer or more flexible than water, yet nothing can resist it.

Promises are like crying babies in a theater, they should be carried out at once.

None but ourselves can free our minds.

It is divinity that shapes, not only your ends, but also your acts, your words and thoughts.

There is always time to add a word, never to withdraw one.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

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

Man is the only creature who refuses to be what he is.