The emotionally mature individual should completely accept the fact that we live in a world of probability and chance, where there are not, nor probably ever will be, any absolute certainties, and should realize that it is not at all horrible, indeed—such a probabilistic, uncertain world.

If human emotions largely result from thinking, then one may appreciably control one's feelings by controlling one's thoughts - or by changing the internalized sentences, or self-talk, with which one largely created the feeling in the first place.

People don't just get upset. They contribute to their upsetness. They always have the power to think, and to think about their thinking, and to think about thinking about their thinking, which the goddamn dolphin, as far as we know, can't do. Therefore they have much greater ability to change themselves than any other animal has, and I hope that REBT teaches them how to do it.

Whenever you avoid alarming situations, you almost always increase your anxiety about them.

The goal...is not to change your desires and wishes but to persuade you to stop demanding that you absolutely must have what you wish-from yourself, from others, and from the world. You can by all means keep your wishes, preferences, and desires, but unless you prefer to remain needlessly anxious, not your grandiose demands.

Thinking rationally is often different from "positive thinking," in that it is a realistic assessment of the situation, with a view towards rectifying the problem if possible.

The best years of your life are the ones in which you decide your problems are your own. You do not blame them on your mother, the ecology, or the president. You realize that you control your own destiny.