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

We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.

It is impossible to speak in such a way that you cannot be misunderstood.

There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world.

My old English buddy, John Rackham, wrote and told me what made science fiction different from all other kinds of literature - science fiction is written according to the science fiction method.

I just try to stuff my brain with everything that I can read on what is going on in science at a very high level, and sometimes I see connections of what might need to be done.

Science is constantly proved all the time. If we take something like any fiction, any holy book, and destroyed it, in a thousand years' time, that wouldn't come back just as it was. Whereas if we took every science book and every fact and destroyed them all, in a thousand years they'd all be back because all the same tests would be the same result.

Tax dollars intended for science education must not be used to teach creationism as any sort of real explanation of nature, because any observation or process of inference about our origin and the nature of the universe disproves creationism in every respect.