The public demands of them that they realize [their occupations] as a ceremony: there is the dance of the grocer, of the tailor, of the auctioneer, by which they endeavour to persuade their clientele that they are nothing but a grocer, an auctioneer, a tailor. A grocer who dreams is offensive to the buyer, because such a grocer is not wholly a grocer.
Jean-Paul Sartre, Being and Nothingness, Page 59. From On Being Authentic, by Charles Guignon.