Michael J. Sullivan said this quote

Hatred. Some people get filled with it and explode. If they survive, they move on. Others just let it dribble out over the years, like a leaky bucket. One day they notice the bucket is empty, and they wonder what had been in it in the first place. Still others use hatred as a weapon, going so far as to pass it onto others–an ugly, unwanted gift disguised as a virtuous heirloom.