Science, not religion, has taught me my most useful values, among them intellectual honesty. It is better to go without answers than to accept those that merely resolve puzzlement.

The human species took a crucial step forward when its vocal musculature came under operant control in the production of speech sounds. Indeed, it is possible that all the distinctive achievements of the species can be traced to that one genetic change.

Give me a child and I'll shape him into anything.

The only geniuses produced by the chaos of society are those who do something about it. Chaos breeds geniuses. It offers a man something to be a genius about.

A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.

The problem of far greater importance remains to be solved. Rather than build a world in which we shall all live well, we must stop building one in which it will be impossible to live at all.

An important fact about verbal behavior is that speaker and listener may reside within the same skin.

I did not direct my life. I didn't design it. I never made decisions. Things always came up and made them for me. That's what life is.

A fourth-grade reader may be a sixth-grade mathematician. The grade is an administrative device which does violence to the nature of the developmental process.