There is a special sadness in achievement, in the knowledge that a long-desired goal has been attained at last, and that life must now be shaped toward new ends.

Only small minds are impressed by large numbers.

There were some things that only time could cure. Evil men could be destroyed, but nothing could be done with good men who were deluded.

If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong.

The future is not to be forecast, but created.

When I start on a book, I have been thinking about it and making occasional notes for some time... So I have lots of theme, locale, subjects and technical ideas... I don't worry about long periods of not doing anything. I know my subconscious is busy.

Whether we are based on carbon or on silicon makes no fundamental difference we should each be treated with appropriate respect.