Stubborn and ardent clinging to one's opinion is the best proof of stupidity.

Accuracy is the twin brother of honesty; inaccuracy, of dishonesty.

A friend to all is a friend to none

Convictions are more dangerous enemies of truth than lies.

We learn from our gardens to deal with the most urgent question of the time: How much is enough?

Intellectuals solve problems, geniuses prevent them.

In order to change the world, you have to get your head together first

The greatest power we have is the power of choice.

To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact

Act enthusiastic and you will be enthusiastic

You don't become what you want, you become what you believe

Kind words don't cost much. Yet they accomplish much.

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

Criticize the act, not the person.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

The smaller the mind, the greater the conceit.

Appearances often are deceiving.

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

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.

Circumstances do not make a man, they reveal him.

When you dance, your purpose is not to get to a certain place on the floor. It's to enjoy each step along the way.