I look upon the too good opinion that man has of himself, as the nursing mother of all false opinions, both public and private.
Michel de MontaigneOne man may have some special knowledge at first-hand about the character of a river or a spring, who otherwise knows only what everyone else knows. Yet to give currency to this shred of information, he will undertake to write on the whole science of physics. From this fault many great troubles spring.
Michel de Montaigne