““Abhed, my father had called heredity-"indivisible." There is an old trope in popular culture of the "crazy genius," a mind split between madness and brilliance, oscillating between the two states at the throw of a single switch. But Rajesh had no switch. There was no split or oscillation, no pendulum. The magic and the mania were perfectly contiguous-bordering kingdoms with no passports. They were part of the same whole, indivisible. "We of the craft are all crazy," Lord Byron, the high priest of crazies, wrote. "Some are affected by gaiety, others by melancholy, but all are more or less touched." Versions of this story have been tool, over and over, with bipolar disease, with some variants of schizophrenia, and with rare cases of autism; all are "more or less touched." It is tempting to romanticize psychotic illness, so let me emphasize that the men and women with these mental disorders experience paralyzing cognitive, social, and psychological disturbances that send gashes of devastation through their lives. But also indubitably, some patients with these syndromes possess exceptional and unusual abilities. The effervescence of bipolar disease has long been linked to extraordinary creativity; at times, the heightened creative impulse is manifest during the throes of mania.””