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

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 stars will live for me, if not anything else

Make a commitment to your self that today, success is your only options! No matter the obstacles, no matter the sacrifice! you have decided you won't be denied, you won't be defeated!

Bee stings are very educational

Building your own house is a primal urge, one of those universal genetic drives like the need to provide for your family.

Trust me, sunscreen is so, so, so important and so I always wear sunscreen, but I still get really tan.

Only in the Fall of 1924 did [Joseph] Stalin discover that it is especially Russia, as distinguished from other countries, which can by its own forces build up a socialist society.

I do not believe in the doctrine of the greatest good of the greatest number. The only real, dignified, human doctrine is the greatest good of all.

Amy Pond is, er...I've sort of fallen in love with Amy Pond.

There are other measures of self-respect for a man, than the number of clean shirts he puts on every day.

The Stone Age did not end because humans ran out of stones. It ended because it was time for a re-think about how we live.