It is opposition that makes us productive.

Nothing is more damaging to the truth than an old error.

Magic is believing in yourself, if you can do that, you can make anything happen.

The summit charms us, the steps to it do not; with the heights before our eyes, we like to linger in the plain. It is only a part of art that can be taught; but the artist needs the whole. He who is only half instructed speaks much and is always wrong; who knows it wholly is content with acting and speaks seldom or late.

Without my attempts in natural science, I should never have learned to know mankind such as it is. In nothing else can we so closely approach pure contemplation and thought, so closely observe the errors of the senses and of the understanding, the weak and strong points of character.

Wanted: A dog that neither barks nor bites, eats broken glass and shits diamonds.

What you can do, or think you can, begin it.