The only true wisdom is in knowing you know nothing.

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

Time stays long enough for anyone who will use it.

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

Wisdom is the daughter of experience.

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.

Realize that everything connects to everything else.

I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do.

If you can't explain it to a six year old, you don't understand it yourself.