"The discovery of DMT in the human body stimulated much less fanfare than did that of endorphins. Anti-psychedelic-drug sentiment sweeping the USA at the time actually turned researchers against studying endogenous DMT. The discoverers of endorphins, in contrast, won Nobel Prizes."

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Pessimists see problems as stemming from stable and universal causes, thus making them less susceptible to corrective action. Optimists, in contrast, view problems as temporary and resulting from specific factors that will either change or be changed.

— Rosabeth Moss Kanter