It is said that power corrupts, but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power.
I grew up poor in crappy situations... various crappy situations. What kept me sane was reading and music. I had so many different literary tastes growing up, be it fiction like Stephen King or Piers Anthony or non-fiction like reading Hunter S. Thompson essays or reading the Beats. I was a huge fan of the Beat movement.
There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.
There are such beings as vampires, some of us have evidence that they exist. Even had we not the proof of our own unhappy experience, the teachings and the records of the past give proof enough for sane peoples.
Love is the only sane and satisfactory answer to the problem of human existence.