of the body must be gradually sacrificed; indeed, in a word, all that is not in absolute harmony with a larger, more durable energy of thought; all the little "harmless" delights which, however inoffensive comparatively, keep alive by example and habit the prejudice in favour of inferior enjoyment, and usurp the place that belongs to the satisfactions of the intellect. These last differ from those of the body, whose development some may assist and others retard. Into the elysian fields of thought enters no satisfaction but brings with it youth, and strength, and ardour; nor is there a thing in this world on which the mind thrives more readily than the ecstasy, nay, the debauch, of eagerness, comprehension, and wonder. 4 The time must come, sooner or later, when our morality will have to conform to the probable mission of the race; when the arbitrary, often ridiculous restrictions whereof it is at present composed will be compelled to make way for the inevitable logical restrictions this mission exacts. For the individual, as for the race, there can be but one code of morals--the subordination of the ways of life to the demands of the general mission that appears entrusted to man. The axis will shift, therefore, of many sins, many great offences; until at last for all the crimes against the body there shall be substituted the veritable crimes against human destiny; in other words, whatever may tend to impair the authority, integrity, leisure, liberty, or power of the intellect.