“Those who promise us paradise on earth never produced anything but hell.”

He who decides one day that scientific statements do not call for any further test and that they can be regarded as finally verified retires from the game.

The way of science is paved with discarded theories that were once declared self-evident.

The method of learning by trial and error – of learning from our mistakes – seems to be fundamentally the same whether it is practiced by lower or by higher animals, by chimpanzees, or by men of science.

In philosophy methods are unimportant; any method is legitimate if it leads to results capable of being rationally discussed.

In so far as a scientific statement speaks about reality, it must be falsifiable: and in so far as it is not falsifiable, it does not speak about reality.

Theology, I still think, is due to a lack of faith.

Science may be described as the art of systematic oversimplification.

The game of science is, in principle, without end.

The essential feature of dualist-interactionism is that the mind and brain are independent entities and that they interact by quantum physics.

“It can’t happen here” is always wrong: a dictatorship can happen anywhere.

A theory that explains everything, explains nothing.

If our civilization is to survive, we must break with the habit of deference to great men.

The simple truth is that truth is hard to come by, and that once found may easily be lost again.

The quest for precision is analogous to the quest for certainty, and both should be abandoned.

Every intellectual has a very special responsibility. He has the privilege and the opportunity of studying.

The aim of argument, or of discussion, should not be victory but progress.

Last night, I was on the threshold of hell. To-day, I am within sight of my heaven. I have my eyes on it: hardly three feet to sever me!

Death and hell are never full, and neither are men’s eyes.

The other night I was lying in bed, looking up at the stars, and I wondered, ‘Where the hell is my roof?

Everything I did in my life that was worthwhile, I caught hell for.

War is hell. Hollywood fantasizes about it and makes it look good; war sucks.

I’m just trying to be the me that I am and not all of this other crap. I just want to be the family man, and if somehow I can make the money to get my ranch and get the hell away from everybody else, that would be awesome.

A man is born alone and dies alone; and he experiences the good and bad consequences of his karma alone; and he goes alone to hell or the Supreme abode.

I don’t believe in an afterlife, so I don’t have to spend my whole life fearing hell, or fearing heaven even more. For whatever the tortures of hell, I think the boredom of heaven would be even worse.