Quote from the Dhammapada (sent by a good friend)

“'He abused me, mistreated me, defeated me, robbed me.' Harboring such thoughts keeps hatred alive."
“'He abused me, mistreated me, defeated me, robbed me.' Releasing such thoughts banishes hatred for all time.”

-AND-

“Those who fail to distinguish the nonessential from the essential, and the essential from the nonessential, will, in feeding on wrong thoughts, fail to attain the essential.”