There is only one good, knowledge, and one evil, ignorance.

Conquering others takes force, conquering yourself is true strength.

I am not an Athenian or a Greek, but a citizen of the world.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Knowing yourself is the beginning of all wisdom.

My brain is only a receiver, in the Universe there is a core from which we obtain knowledge, strength and inspiration. I have not penetrated into the secrets of this core, but I know that it exists.

Death may be the greatest of all human blessings.

There's no one thing that's true. It's all true.

The most important knowledge is that which guides the way you lead your life.