People who think they know everything are a great annoyance to those of us who do.

Author: Isaac Asimov

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The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

Never let your sense of morals prevent you from doing what's right.

Humanity has the stars in its future, and that future is too important to be lost under the burden of juvenile folly and ignorant superstition.

Creationists make it sound as though a 'theory' is something you dreamt up after being drunk all night.

The most effective way to destroy people is to deny and obliterate their own understanding of their history.

Love is when two people know everything about each other and are still friends.

I have found out that there ain’t no surer way to find out whether you like people or hate them than to travel with them.

People don’t take trips, trips take people.