"Now in creative thought common sense is a bad master. Its sole criterion for judgement is that the new ideas shall look like the old ones. In other words it can only work by suppressing originality."

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Both in the lower and the middle classes the wiseacres urge young men 'to think it over' before taking the decisive step. Thus they foster the delusion that the choice of a wife or husband may be governed by a certain number of accurately weighable pros and cons. This is a crude delusion on the part of common sense.

— Denis de Rougemont