I'll copy someone's comment from a related thread: G.K.Chesterton knew it, 100 years ago: "... insanity is often marked by the dominance of reason and the exc

I'll copy someone's comment from a related thread: G.K.Chesterton knew it, 100 years ago: "... insanity is often marked by the dominance of reason and the exclusion of creativity and humour. Pure reason is inhuman. The madman’s mind moves in a perfect, but narrow, circle, and his explanation of the world is comprehensive, at least to him." It's a very common failure mode, in fact. We tend to swipe inconvenient emotions under the rug, into our subconscious basement. Those emotions don't disappear, and their fumes start poisoning the mind, who believes that it sees clearly. Instead, it quickly surrounds itself with a shell of illusion. In that imaginary castle it sits and slowly goes insane. A simple self-test is asking yourself: do you feel compassion to those around you? Mind alone cannot create compassion, it comes from above to guide the mind. That's also why living a solitary life is a bad idea, especially when your mind wants to self-isolate to guard its precious inner world.