Mathematicians deal with large numbers sometimes, but never in their income.

They absorb carbon monoxide and carbon dioxide and give out oxygen. What could be more desirable? And they look good in the bargain. Stop chopping down the rain forests and plant more saplings, and we're on our way.

The true artist is quite rational as well as imaginative and knows what he is doing; if he does not, his art suffers.

The temptation was great to muster what force we could and put up a fight. It's the easiest way out, and the most satisfactory to self-respect--but, nearly invariably, the stupidest.

Inspect every piece of pseudoscience and you will find a security blanket.

Naturally, there's got to be a limit for I don't expect to live forever, but I do intend to hang on as long as possible.

The Earth faces environmental problems right now that threaten the imminent destruction of civilization and the end of the planet as a livable world. Humanity cannot afford to waste its financial and emotional resources on endless, meaningless quarrels between each group and all others. there must be a sense of globalism in which the world unites to solve the real problems that face all groups alike.