When you let anger build up, you poison yourself and everyone around you. Peace, however, is just as contagious. Find a good state of mind, something that brings a smile to your face, and nothing can ever beat you.
In The Grumpy Duck by Chris D. Henry, we meet one individual who never learned any of this lesson. He passes from one day to the next convinced that everyone is against him and that the world is just one big conspiracy to get him down.