Anger!

When angry, count to four. When very angry, swear.
--Mark Twain

For every minute you are angry you lose sixty seconds of happiness.
--Ralph Waldo Emerson

Speak when you are angry - and you'll make the best speech you'll ever regret.
--Dr Laurence J. Peter

Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned.
--Buddha

Anger is never without a reason, but seldom with a good one.
--Benjamin Franklin

Anyone who angers you conquers you.
--Anonymous

It is wise to direct your anger towards problems not people; to focus your energies on answers not excuses.
--William Arthur Ward

There are two things a person should never be angry at, what they can help, and what they cannot. --Plato