"An investor will succeed by coupling good business judgment with an ability to insulate his thoughts and behavior from the super-contagious emotions that swirl about the marketplace."

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Nothing is more contagious than example, and no man does any exceeding good or exceeding ill but it spawns new deeds of the same kind. The good we imitate through emulation, the ill through the malignity of our nature, which shame keeps locked up, but example sets free.

— Francois de La Rochefoucauld