The failure to think positively can weigh on a cancer patient like a second disease.

As a recent editorial in the Journal of Clinical Oncology put it: "What we must first remember is that the immune system is designed to detect foreign invaders, and avoid out own cells. With few exceptions, the immune system does not appear to recognize cancers within an individual as foreign, because they are actually part of the self.

Breast cancer, I can now report, did not make me prettier or stronger, more feminine or spiritual. What it gave me, if you want to call this a “gift,” was a very personal, agonizing encounter with an ideological force in American culture that I had not been aware of before—one that encourages us to deny reality, submit cheerfully to misfortune, and blame only ourselves for our fate.

Well, the first thing that clued me in to the fact that there was something really scary about breast cancer, way beyond the thought of dying, was coming across an ad in the newspaper for pink breast cancer teddy bears. I am not that afraid of dying, but I am terrified of dying with a pink teddy bear under my arm.