You know what they say about bold spacemen never becoming old spacemen.

Anybody can find infinite Mandelbrot figures in his navel.

I have yet to see any problem, however complicated, which, when you looked at it in the right way, did not become still more complicated.

We live with our archetypes, but can we live in them?

The single definition of government I've ever seen that makes sense is that it's the organization which claims the right to kill people who won't do what it wants.

A man isn't really alive till he has something bigger than himself and his own little happiness, for which he'd gladly die.

Timidity can be as dangerous as rashness.

A fanatic is a man who, when he's lost sight of his purpose, redoubles his effort.

He had seen too much of the cosmos to have any great faith in man's ability to understand it.

If we knew exactly what to expect throughout the Solar System, we would have no reason to explore it.

What five books would I like to be remembered for? Well... Tau Zero, I like that one especially. It was somewhat of a tour de force, and I think it got across what I was trying for.

Every Democrat on Capitol Hill professes to be a fiscal hawk.

I wish you the beast of luck!

I believe that music surpasses even language in its power to mirror the innermost recesses of the human soul

Changing husbands is about as satisfactory as changing a bundle from one hand to the other; it gives you only temporary relief.

When the fun goes out of getting dressed, you might as well be dead.

That's the authentic punk dance. It's like a child dizzy on lemonade.

We prize books, and they prize them most who are themselves wise.

Sometimes it's a little better to travel than to arrive

Dally was so real he scared me.

It seems like my whole life I've been this little Canadian kid dreaming somebody would give me a chance.