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.

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.

Lewis at his best is about trying on ways of looking at the world.

I would say my greatest achievement in life right now - my greatest achievement period is - and I'm still trying to achieve it - is to be a wonderful father to my kids.

The more difficult a problem becomes, the more interesting it is.

Most sound people don't get the assignment to create worlds of sound and get freedom to try a lot of things and then get the scrutiny and support of the team over a long period of time.

For a player to be good enough to play for Liverpool, he must be prepared to run through a brick wall for me then come out fighting on the other side.

I can have fairly crippling self-criticism. It doesn't really put me in a vulnerable state, I just get glum and intolerable, but it certainly is a vulnerability.

The task of the solitary man is to be even more solitary.

I know there's life after the Olympics.

I love every-day senses, every-day wit and entertainment; a man who is only good on holidays, is good for very little.

If you look at sentencing in America, African-Americans and Latinos get sentenced for the same crimes at very different rates.