If you can’t explain it to a six year old, you don’t understand it yourself.
Simplicity is a difficult thing to achieve.
Motivation is simple. You eliminate those who are not motivated.
Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.
Life is really simple, but we insist on making it complicated.
I believe that a simple and unassuming manner of life is best for everyone, best both for the body and the mind.