I have a friend who is both a genius and has a mood disorder, I asked a psychologist, if mood disorders are real, and he said, which I believe, that (though not taking away from the possibility there biological factors) that studies show, that what we think about, affects our mood – the reason I say this is simple, Freud believed, from people with mental disturbances we can learn – extrapolate to people without them; for in truth, as Dr. Lazerson writes, it’s all F.I.D. (Frequency, Intensity, Duration) any normal person fluctuates, if he doesn’t, he is not thinking.