This peace, like this joy, is essential to life. It guards us. It guards our hearts and minds in Christ Jesus. Here is the key to managing stress: grapple with God until joy and peace in believing returns. Only then can we go to the world and take on the stress we need to absorb, if we are to be his agents in a torn world.
Angry Christian leaders have no freshness in their spiritual life. Sooner or later the weight of their anger shows in an ineffective, unattractive ministry. We must work at having our lives controlled by joy, not by anger. Angry people cannot be gentle under provocation. Any kind of provocation acts as a switch to release hidden anger.
from Missionaries For the Right Reasons