All mankind, right down to those you most despise, are your neighbors.
Hypocrisy is a universal phenomenon. It ends with death, but not before.
Ideas are cheap. It's only what you do with them that counts.
It is only afterward that a new idea seems reasonable. To begin with, it usually seems unreasonable.
It is surely better to be wronged than to do wrong.
No matter how outrageous a lie may be, it will be accepted if stated loudly enough and often enough.
Once you've dissected a joke, you're about where you are when you've dissected a frog. It's dead.
Predicting the future is a hopeless, thankless task, with ridicule to begin with and, all too often, scorn to end with.
Science doesn't purvey absolute truth. Science is a mechanism.... It's a system for testing your thoughts against the universe and seeing whether they match.
Straightforward preaching spoils the effectiveness of a story. If you can't resist the impulse to improve your fellow human beings, do it subtly.
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
There is a kind of selective memory that afflicts men when they view the past. They see the good and overlook the evil.
There is no belief, however foolish, that will not gather its faithful adherents who will defend it to the death.