, however, they still possess, for this is the only power that is inexhaustible; and they try to stimulate their will by passionate excitement, such as games of chance for high stakes -- undoubtedly a most degrading form of vice. And one may say generally that if a man finds himself with nothing to do, he is sure to choose some amusement suited to the kind of power in which he excels, -- bowls, it may be, or chess; hunting or painting; horse-racing or music; cards, or poetry, heraldry, philosophy, or some other dilettante interest. We might classify these interests methodically, by reducing them to expressions of the three fundamental powers, the factors, that is to say, which go to make up the physiological constitution of man; and further, by considering these powers by themselves, and apart from any of the definite aims which they may subserve, and simply as affording three sources of possible pleasure, out of which every man will choose what suits him, according as he excels in one direction or another. First of all come the pleasures of vital energy , of food, drink, digestion, rest and sleep; and there are parts of the world where it can be said that these are characteristic and national pleasures. Secondly, there are the pleasures of muscular energy , such as walking, running, wrestling, dancing, fencing, riding and similar athletic pursuits, which sometimes take the form of sport, and sometimes of a military life and real warfare. Thirdly, there