The Stomach is a slave that must accept everything that is given to it, but which avenges wrongs as slyly as the slave does. [ E. Souvestre ]

Custom is a violent and treacherous school mistress. She, by little and little, 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. [ Montaigne ]