The consequences of an act affect the probability of its occurring again.

If freedom is a requisite for human happiness, then all that’s necessary is to provide the illusion of freedom.

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.

Some of us learn control, more or less by accident. The rest of us go all our lives not even understanding how it is possible, and blaming our failure on being born the wrong way.

Does a poet create, originate, initiate the thing called a poem, or is his behavior merely the product of his genetic and environmental histories?

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

Death does not trouble me. I have no fear of supernatural punishments, of course, nor could I enjoy an eternal life in which there would be nothing left for me to do, the task of living having been accomplished.