They are building blocks of words which form our languages. Languages help us communicate. Even with complicated languages used by intelligent people, misunderstanding is a common occurrence. Letters and words, calling out for understanding. Anger is usually present in arguments and fights.
Anger is an emotion, usually classified as a negative emotion.
Negative emotions can cause severe problems in our environment and to the health of our body. Happiness, usually classified as a positive emotion, can bring good health to our body, and spread positive vibrations into our environment. Sometimes when we are ill, we are not on our best behavior. Sometimes nature plays tricks on us and we imagine we are something other than what we truly are. Both heads thought the other was following itself.