He who has health has hope, and he who has hope has everything.

Let a man radically alter his thoughts, and he will be astonished at the transformation.

Human history becomes more and more a race between education and catastrophe.

Yeah we all shine on, like the moon, and the stars, and the sun

We can no longer think of the people and problems in other parts of the world as “foreign” to us.

I derive just as much happiness from the process as from the results.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.