Experience abundantly shows how powerfully the steady action of such a will can operate upon innate defects, converting the constitutional idler into the indefatigably industrious, checking, limiting and sometimes almost destroying constitutional irritability and vicious passions. The natural power of the will in different men differs greatly, but there is no part of our nature which is more strengthened by exercise or more weakened by disuse. The minor faults of character it can usually correct; but when a character is once formed, and when its tendencies are essentially vicious, radical cure or even considerable amelioration is very rare. Sometimes the strong influence of religion effects it. Sometimes it is effected by an illness, a great misfortune, or the total change of associations that follows emigration. Marriage perhaps more frequently than any other ordinary agency in early life transforms or deeply modifies the character, for it puts an end to powerful temptations and brings with it a profound change of habits and motives, associations and desires. But we have all of us encountered in life depraved natures in which vicious self-indulgence had attained such a strength, and the recuperating and moralising elements were so fatally weak, that we clearly perceive the disease to be incurable, and that it is hardly possible that any change of circumstances could even seriously mitigate it. In what proportion this is the fault or the calamity of the patient no human judgment can accurately tell. Few things are sadder than to observe how frequently the inheritance of great wealth or even of easy competence proves the utter and speedy ruin of a young man, except when the administration of a large property, or the necessity of carrying on a great business, or some other propitious circumstance provides him with a clearly defined sphere of work. The majority of men will gladly discard distasteful work which their circumstances do not require; and in the absence of steady work, and in the possession of all the means of gratification, temptations assume an overwhelming strength, and the springs of moral life are fatally impaired. It can hardly be doubted that the average longevity in this small class is far less than in that of common men, and that even when natural capacity is considerable it is more rarely displayed. To a man with a real desire for work such circumstances are indeed of inestimable value, giving him the leisure and the opportunities of applying himself without distraction and from early manhood to the kind of work that is most suited to him. Sometimes this takes place, but much more frequently vicious tastes or a simply idle or purposeless life are the result. Sometimes, indeed, a large amount of desultory and unregulated energy remains, but the serious labour of concentration is shunned and no real result is attained. The stream is there, but it turns no mill.