William March

“In the first place, good people are rarely suspicious; they cannot imagine others doing the things they themselves are incapable of doing; usually they accept the undramatic conclusion as the correct one, and let matters rest there. Then, too, the normal are inclined to view the multiple killer as the as the one who’s as monstrous in appearance as he is in mind, which is about as far from the truth as one could well get. He paused and then said that these monsters of real life usually looked and behaved in a more normal manner than their actually normal brothers and sisters: they presented a more convincing picture of virtue than virtue presented of itself—just as the wax rosebud or the plastic peach seemed more perfect to the eye, more what the mind thought a rosebud or a peach should be than the imperfect original from which it had been modeled.”
― William March

“It seemed to her suddenly that violence was an inescapable factor of the heart, perhaps the most important factor of all - an ineradicable thing that lay, like a bad seed, behind kindness, behind compassion, behind the embrace of love itself. Sometimes it lay deeply hidden, sometimes it lay close to the surface; but always it was there, ready to appear, under the right conditions, in all its irrational dreadfulness.”
― William March, The Bad Seed