Once you can reproduce a phenomenon, you are well on the way to understanding it.

When all else failed, you had to rely on eyeball intrumentation.

Until we get rid of religion, we won't be able to conduct the search for God.

I sometimes think that the universe is a machine designed for the perpetual astonishment of astronomers.

'The Devil in the Dark' impressed me because it presented the idea, unusual in science fiction then and now, that something weird, and even dangerous, need not be malevolent. That is a lesson that many of today's politicians have yet to learn.

If we have learned one thing from the history of invention and discovery, it is that, in the long run-and often in the short one-the most daring prophecies seem laughably conservative.

Now I understand,” said the last man.