...not everyone is willing to defend a position of 'not knowing.' There is no virtue in ignorance for its own sake.

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.

The Earth is God's pinball machine and each quake, tidal wave, flash flood and volcanic eruption is the result of a TILT that occurs when God, cheating, tries to win free games.

You see, the point is that the strongest man in the world is he who stands most alone.

Independence is a very subjective assessment.

I'm one of those religious people who are afraid of everything. I'm instantly worried about everything that could go wrong.

Classifying the stars has helped materially in all studies of the structure of the universe.

I'm still number one and I just recently won a major tournament ahead of my toughest rivals so I think I had a few years ahead of me if I decided to stay.

For me, when I watch something without music, I'm instantly thinking, "Okay, what am I going to do here? How am I going to convey this?" I take notes and really think about that.

What springs from earth dissolves to earth again, and heaven-born things fly to their native seat.

Self-approval is acquired mainly from the approval of other people.

When you hit seventy you sleep sounder, you feel more alive than when you were thirty. Obviously it's healthier to have women on your mind than on your knees.