“Yield to temptation. It may not pass your way again.”

It’s an indulgence to sit in a room and discuss your beliefs as if they were a juicy piece of gossip.

One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.

The universe never did make sense; I suspect it was built on government contract.

When a place gets crowded enough to require ID’s, social collapse is not far away. It is time to go elsewhere.

Theologians can persuade themselves of anything.

Everything is theoretically impossible, until it is done.

I am free because I know that I alone am morally responsible for everything I do.

There is no way that writers can be tamed and rendered civilized or even cured.

The best thing about space travel is that it made it possible to go elsewhere.

They didn’t want it good, they wanted it Wednesday.

Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy.

Never worry about theory as long as the machinery does what it’s supposed to do.

A society that gets rid of all its troublemakers goes downhill.

When any government, or any church for that matter, undertakes to say to its subjects, This you may not read, this you must not see, this you are forbidden to know, the end result is tyranny and oppression no matter how holy the motives.

The human race divides politically into those who want people to be controlled and those who have no such desire.

No statement should be believed because it is made by an authority.