The only true wisdom is in knowing you know nothing.

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

Anyone who has never made a mistake has never tried anything new.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

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

Where there is shouting, there is no true knowledge.

A clever person solves a problem. A wise person avoids it.

I have no special talents. I am only passionately curious.

Reality is merely an illusion.