If a person thinks he can be happy without making those around him happy, he's crazy.

For nearly a quarter of a century, I have been engaged in the investigation of the fundamentals of life, the material universe and human behavior. Such an adventure leads one down many highways, through many byroads, into many back alleys of uncertainty, through many strata of life...

The greatest ability in the whole human race and all amongst the livingness, is the ability to help. And when you can improve that ability all the way up along the line, you've improved about all there is to improve about a person.

It is a remarkable fact, a scientific fact, that the healthiest children come from the happiest mothers.

Man thrives, oddly enough, only in the presence of a challenging environment.

An individual who can freely and with a clear heart do things because they're fun is a very sane person.

I'll not always be here on guard. The stars twinkle in the Milky Way and the wind sighs for songs across the empty fields of a planet a Galaxy away. You won't always be here. But before you go, whisper this to your sons and their sons - "The work was free. Keep it so.