Custom is a violent and treacherous school mistress. She, by little and lithe, slyly and unperceived, slips in the foot of her authority; but having by this gentle and humble beginning, with the benefit of time, fixed and established it, she then unmasks a furious and tyrannic countenance, against which we have no more the courage or the power so much as to lift up our eyes.
Michel de MontaigneThe height and value of true virtue consists in the facility, utility, and pleasure of its exercise; so far from difficulty, that boys, as well as men, and the innocent as well as the subtle, may make it their own; and it is by order and good conduct, and not by force, that it is to be acquired.
Michel de Montaigne