The psychopath in a position of supreme power is almost a commonplace, for no one except a psychopath wants supreme power. To enjoy power is to be damned; to enjoy arbitrary power is to be damned beyond any hope of ultimate redemption. It is not only that power corrupts in ever widening circles, but it inevitably tends to be used senselessly and irresponsibly, a fact well known to every little functionary placed in a position of authority.

Hitler was power raised to its ultimate potential..

--The life and death of Adolf Hitler by Robert Payne.