At this very moment enormous numbers of intelligent men and women of goodwill are trying to build a better world. But problems are born faster than they can be solved.

The simulated approval and affection with which parents and teachers are often urged to solve behavior problems are counterfeit. So are flattery, backslap-ping, and many other ways of "winning friends.

A disappointment is not generally an oversight. It might just be the best one can do the situation being what it is. The genuine error is to quit attempting.

The world's a poor standard. any society which is free of hunger and violence looks bright against that background.

I've often said that my rats have taught me much more than I've taught them.

What is love except another name for the use of positive reinforcement? Or vice versa.

If you're old, don't try to change yourself, change your environment.