We have not yet seen what man can make of man.

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.

A person who has been punished is not thereby simply less inclined to behave in a given way; at best, he learns how to avoid punishment.

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

The major difference between rats and people is that rats learn from experience.

Education is what survives when what has been learned has been forgotten.

Behavior is determined by its consequences.

That's all teaching is; arranging contingencies which bring changes in behavior.

Behavior is shaped and maintained by its consequences

The way positive reinforcement is carried out is more important than the amount.

It is not a question of starting. The start has been made. It's a question of what's to be done from now on.

A man without pleasure is a man without any idea what life is about

There's an epigram tacked to my office bulletin board, pinched from a magazine -- "Wanting to meet an author because you like his work is like wanting to meet a duck because you like pâté.

Unity is the most important thing on the road to stamping out terror. You need global rules of law and order, and they have to be enforced. Start with that principle.

Life creates conditions conducive to life.

The talked-about is always the last to hear the talk . . .

Science is wonderful at explaining what science is wonderful at explaining, but beyond that it tends to look for its car keys where the light is good.

Logic taken to an extreme would always equal chaos.

The trouble with morning is that it comes well before noon.

I think when people are jumping on top of each other's ideas, it elevates it a lot more than me going into the studio and working on something all by myself for a while.

The lives of men who have been always growing are strewed along their whole course with the things they have learned to do without.