There was no future and no past. The present was eternity. - Arnold M. Ludwig

While mental disturbances may provide individuals with an underlying sense of unease that seems necessary for sustained creative activity, these disturbances are not the only source for inner tension... chronic physical ailments may give someone a heightened sense of urgency to leave a mark on the world and achieve immortality through creative greatness.

Paranoia is naturally common among all kinds of rulers, especially tyrants and visionaries.

Although humans and baboons may fight among themselves, dominate others, and keep harems, only humans have the ability to give pious excuses for what they do.