It's so important to realize that every time you get upset, it drains your emotional energy. Losing your cool makes you tired. Getting angry a lot messes with your health.

“I am learning how to be angry and sad and lonely and joyful and excited and afraid and happy.”

If i wish to compose or write or pray or preach well, i must be angry. Then all the blood in my veins is stirred, and my understanding is sharpened.