"The passion for revenge should never blind you to the pragmatics of the situation. There are some people who are so blighted by their past, so warped by experience and the pull of that silken cord, that they never free themselves of the shadows that live in the time machine...

And if there is a kind thought due them, it may be found contained in the words of the late Gerald Kersh, who wrote:"... there are men whom one hates until a certain moment when one sees, through a chink in their armour, the writhing of something nailed down and in torment."
— Harlan Ellison (The Essential Ellison: A 50 Year Retrospective)