It's not what you are that holds you back, it's what you think you are not.

There are two things a person should never be angry at, what they can help, and what they cannot.

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.

Those who know do not speak, those who speak do not know.

If you tell the truth, you don't have to remember anything.

I cannot teach anybody anything. I can only make them think.

Always go too far, because that's where you'll find the truth.

We may have all come on different ships, but we’re in the same boat now.