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

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

Where there is shouting, there is no true knowledge.

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.

Insanity is doing the same thing over and over again and expecting different results.

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

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

Reality is merely an illusion.

Only a life lived for others is a life worthwhile.