"And thought struggles against the results, trying to avoid those unpleasant results while keeping on with that way of thinking. That is what I call 'sustained incoherence."

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If you engage in positive thinking to overcome negative thoughts, the negative thoughts are still there acting. That's still incoherence. It's not enough just to engage in positive thoughts when you have negative thoughts registered, because they keep on working and will cause trouble somewhere else.

— David Bohm