Don't mess up the environment until you're quite sure what you're doing.

Before you become too entranced with gorgeous gadgets and mesmerizing video displays, let me remind you that information is not knowledge, knowledge is not wisdom, and wisdom is not foresight. Each grows out of the other, and we need them all.

God said, 'Cancel Program GENESIS.' The universe ceased to exist.

It is a good principle in science not to believe any 'fact'---however well attested---until it fits into some accepted frame of reference. Occasionally, of course, an observation can shatter the frame and force the construction of a new one, but that is extremely rare. Galileos and Einsteins seldom appear more than once per century, which is just as well for the equanimity of mankind.

The only way to define your limits is by going beyond them.

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

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.