I've heard two similar:

"holding anger is like grasping a hot coal with the intent of
throwing it at someone else; you are the only one who gets burned"
-supposedly Buddha

"resentment is like taking poison and waiting for the other person
to die"
-Malachy McCourt

Edited by LukeJavan8 (01/22/13 11:02 AM)
----please, draw me a sheep----