Fatigue – the emotional cost of the moral life?

Fatigue is a fascinating moral phenomenon. It can be a consequence of attentiveness, a willingness to face the realities of the world. But it can also be a form of avoidance, of “moral laziness”, the symptom of an active desire not to confront matters that seem to call for our attention. What are the dangers of fatigue, and how are we to respond to it when it overtakes us?