To neurophysiologists, who research cognitive functions, the emotionally driven appear to suffer from cognitive deficits that mimic certain types of brain injuries. Not just partisan political junkies, but ardent sports fans, the devout, even hobbyists. Anyone with an intense emotional interest in a subject loses the ability to observe it objectively: You selectively perceive events. You ignore data and facts that disagree with your main philosophy. Even your memory works to fool you, as you selectively retain what you believe in, and subtly mask any memories that might conflict.

Studies have shown that we are actually biased in our visual perception - literally, how we see the world - because of our belief systems.

When people become emotionally involved with something, they lose perspective on it, missing information that contradicts their emotional investment.

I reflected. "What else may not the samurai do?"

"Acting, singing, or reciting are forbidden them, though they may lecture authoritatively or debate. But professional mimicry is not only held to be undignified in a man or woman, but to weaken and corrupt the soul; the mind becomes foolishly dependent on applause, over-skilful in producing tawdry and momentary illusions of excellence; it is our experience that actors and actresses as a class are loud, ignoble, and insincere. If they have not such flamboyant qualities then they are tepid and ineffectual players.

The voluntary nobility of H.G.Wells Utopia may not sing or act, as professional mimicry is undignified.