It took me better than a quarter century to learn, the hard way, that hard work at something you want to be doing is the most fun that you can have out of bed . . . to learn that the smart man finds ways to make everything he does be work; to learn that "leisure" time is truly pleasurable (indeed tolerable) only to the extent that is its subconscious grazing for information with which to infuse newer, better work.

The day Apollo 11 landed, I knew men would walk on Mars in my lifetime. I'm no longer nearly so sure. The last budget put forward in Canada contained not a penny for Mars.

Shared joy is increased, shared pain is lessened.

To all the Callahan's Places there ever were or ever will be, whatever they may be called — and to all the merry maniacs and happy fools who are fortunate enough to stumble into one: may none of them arrive too late!

If a person who indulges in gluttony is a glutton, and a person who commits a felony is a felon, then God is an iron.

The whole world turns upside down in ten years, but you turn upside down with it.

It took a couple of hundred million years to develop a thinking ape and you want a smart one in a lousy few hundred thousand?