"Infidelity is one of those coinages,-a mass of base money that won't pass current with any heart that loves truly, or any head that thinks correctly. And infidels are poor sad creatures; they carry about them a load of dejection and desolation, not the less heavy that it is invisible. It is the fearful blindness of the soul."

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However, optimism is highly valued, socially and in the market; people and firms reward the providers of dangerously misleading information more than they reward truth tellers. One of the lessons of the financial crisis that led to the Great Recession is that there are periods in which competition, among experts and among organizations, creates powerful forces that favor a collective blindness to risk and uncertainty.

— Daniel Kahneman