These changes of taste are very analogous to what takes place in our moral dispositions. They are for the most part in themselves simply external to morals, though there is at least one conspicuous exception. Many--it is to be hoped most--men might spend their lives with full access to intoxicating liquors without even the temptation of getting drunk. Apart from all considerations of religion, morals, social, physical, or intellectual consequences, they abstain from doing so simply as a matter of taste. With other men the pleasure of excessive drinking is such that it requires an heroic effort of the will to resist it. There are men who not only are so constituted that it is their greatest pleasure, but who are even born with a craving for drink. In no form is the terrible fact of heredity more clearly or more tragically displayed. Many, too, who had originally no such craving gradually acquire it: sometimes by mere social influence, which makes excessive drinking the habit of their circle; more frequently through depression or sorrow, which gives men a longing for some keen pleasure in which they can forget themselves; or through the jaded habit of mind and body which excessive work produces, or through the dreary, colourless, joyless surroundings of sordid poverty. Drink and the sensual pleasures, if viciously indulged, produce (doubtless through physical causes) an intense craving for their gratification. This, however, is not the case with all our pleasures. Many are keenly enjoyed when present, yet not seriously missed when absent. Sometimes, too, the effect of over-indulgence is to vitiate and deaden the palate, so that what was once pleasing ceases altogether to be an object of desire. This, too, has its analogue in other things. We have a familiar example in the excessive novel-reader, who begins with a kind of mental intoxication, and who ends with such a weariness that he finds it a serious effort to read the books which were once his strongest temptation. Tastes of the palate also naturally change with age and with the accompanying changes of the body. The schoolboy who bitterly repines because the smallness of his allowance restricts his power of buying tarts and sweetmeats will probably grow into a man who, with many shillings in his pocket, daily passes the confectioner's shop without the smallest desire to enter it.