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.

Much of what we call emotion is nothing more or less than a certain kind - a biased, prejudiced, or strongly evaluative kind - of thought.

If you would stop, really stop, damning yourself, others, and unkind conditions, you would find it almost impossible to upset yourself emotionally - about anything. Yes, anything.

People and things do not upset us. Rather, we upset ourselves by believing that they can upset us.

If the Martians ever find out how human beings think, they'll kill themselves laughing.

Most people would have given up when faced with all the criticism I've received over the years.

The goal of all life is to have a ball.