Like many people who are losing their grip, he mistook it for the coming of a new wisdom in himself. — Robertson Davies

Unhappiness of the kind that is recognized and examined and brooded over is a spiritual luxury.

During the First World War some of the English troops used to go over the top shouting, "Marmalade!" in humorously chivalrous voices, as if it were a heroic battle-cry. The Germans could never get used to it. They puzzled tirelessly to solve the mystery. Because a German cannot conceive that a man in battle would want to be funny, you see. But I think the English were dissembling the horror of their situation so that they would not notice how close they were to Death. Again, humour was essentially evil. If they had thought of the truth of their situation, they might not have gone over the top. And that might have been a good thing.

It is a widespread idea that people who are unusually cruel must be insane, though the corollary of that would be that anybody who is unusually compassionate must be insane.