Stuck listening to the enraged ramblings of an involuntarily committed schizophrenic, though half his words are unintelligible, the self-righteous indignation comes through.

It occurs to me that righteous rage is a mood enhancer. Perhaps even the more sane of us (or more functionally insane) also will invent reasons to fume to lift ourselves up from pathetic obscurity to the ranks of the St George skewering demons with our profanities.

According to Plotinus, evil is a result of ignorance, bewilderment, and weariness.