The formation of the habits depends chiefly upon the leading desire or governing purpose, because whatever the mind desires the most it will _act_ the most to secure, and thus by repeated acts will form its habits. The _character_ of every individual, therefore, as before indicated, depends upon the mode of seeking happiness selected by the will. Thus the ambitious man has selected the attainment of power and admiration as his leading purpose, and whatever modes of enjoyment interfere with this are sacrificed. The sensual man seeks his happiness from the various gratifications of sense, and sacrifices other modes of enjoyment that interfere with this. The man devoted to intellectual pursuits, and to seeking reputation and influence through this medium, sacrifices other modes of enjoyment to secure this gratification. The man who has devoted his affections and the service of his life to God and the good of his fellow-men sacrifices all other enjoyments to secure that which results from the fulfillment of such obligations. Thus a person is an ambitious man, a sensual man, a man of literary ambition, or a man of piety and benevolence, according to the governing purpose or leading desire of the mind. There is one fact in regard to the choice of the leading object of desire, or the governing purpose of life, which is very important. Certain modes of enjoyment, in consequence of repetition, increase the desire, but lessen the capacity of happiness from this source; while, in regard to others, gratification increases the desire, and at the same time increases the capacity for enjoyment. The enjoyments through the senses are of the first kind. It will be found, as a matter of universal experience, that where this has been chosen as the main purpose of life, though the desire for such pleasures is continually increased, yet, owing to the physical effects of excessive indulgence, the capacity for enjoyment is decreased. Thus the man who so degrades his nature as to make the pleasures of eating and drinking the great pursuit of life, while his desires never abate, finds his zest for such enjoyments continually decreasing, and a perpetual need for new devices to stimulate appetite and awaken the dormant capacities. The pleasures of sense always pall from repetition--grow "stale, flat, and unprofitable," though the deluded being who has slavishly yielded to such appetites feels himself bound by chains of habit, which, even when enjoyment ceases, seldom are broken.