Ceaseless optimism about the future only makes for a greater shock when things go wrong; by fighting to maintain only positive beliefs about the future, the positive thinker ends up being less prepared, and more acutely distressed, when things eventually happen that he can't persuade himself to believe are good.

Through positive thinking and related approaches, we seek the safety and solid ground of certainty, of knowing how the future will turn out, of a time in the future when we'll be ceaselessly happy and never have to fear negative emotions again. But in chasing all that, we close down the very faculties that permit the happiness we crave.

The effort to try to feel happy is often precisely the thing that makes us miserable.

Uncertainty is where things happen. It is where the opportunities - for success, for happiness, for really living - are waiting.

Confronting the worst-case scenario saps it of much of its anxiety-inducing power. Happiness reached via positive thinking can be fleeting and brittle, negative visualization generates a vastly more dependable calm.

Ceaseless optimism about the future only makes for a greater shock when things go wrong; by fighting to maintain only positive beliefs about the future, the positive thinker ends up being less prepared, and more acutely distressed, when things eventually happen that he can't persuade himself to believe are good.

The effort to feel happy is often precisely the thing that makes us miserable. And that it is out constant efforts to eliminate the negative - insecurity, uncertainty, failure, or sadness - that is what causes us to feel so insecure, anxious, uncertain, or unhappy.