I believe that curiosity, wonder and passion are defining qualities of imaginative minds and great teachers; that restlessness and discontent are vital things; and that intense experience and suffering instruct us in ways that less intense emotions can never do.

I have had manic-depressive illness, also known as bipolar disorder, since I was 18 years old. It is an illness that ensures that those who have it will experience a frightening, chaotic and emotional ride. It is not a gentle or easy disease.

There is no common standard for education about diagnosis. Distinguishing between bipolar depression and major depressive disorder, for example, can be difficult, and mistakes are common. Misdiagnosis can be lethal. Medications that work well for some forms of depression induce agitation in others.

Knowledge is marvelous, but wisdom is even better.

Psychologists, for reasons of clinical necessity or vagaries of temperament, have chosen to dissect and catalog the morbid emotions - depression, anger, anxiety - and to leave largely unexamined the more vital, positive ones.