As it is, however, the current ideas concerning the relative claims of egoism and altruism are vitiated by the omission of this all all-important factor. For if health, strength and capacity, are usually transmitted; and if disease, feebleness, stupidity, generally reappear in descendants; then a rational altruism requires insistance on that egoism which is shown by receipt of the satisfactions accompanying preservation of body and mind in the best state. The necessary implication is that blessings are provided for offspring by due self-regard, while disregard of self carried too far provides curses. When, indeed, we remember how commonly it is remarked that high health and overflowing spirits render any lot in life tolerable, while chronic ailments make gloomy a life most favorably circumstanced, it becomes amazing that both the world at large and writers who make conduct their study, should ignore the terrible evils which disregard of personal well-being inflicts on the unborn, and the incalculable good laid up for the unborn by attention to personal well-being. Of all bequests of parents to children the most valuable is a sound constitution. Though a man's body is not a property that can be inherited, yet his constitution may fitly be compared to an entailed estate; and if he rightly understands his duty to posterity, he will see that he is bound to pass on that estate uninjured if not improved. To say this is to say that he must be egoistic to the extent of satisfying all those desires associated with the due performance of functions. Nay, it is to say more. It is to say that he must seek in due amounts the various pleasures which life offers. For beyond the effect these have in raising the tide of life and maintaining constitutional vigor, there is the effect they have in preserving and increasing a capacity for receiving enjoyment. Endowed with abundant energies and various tastes, some can get gratifications of many kinds on opportunities hourly occurring; while others are so inert, and so uninterested in things around, that they cannot even take the trouble to amuse themselves. And unless heredity be denied, the inference must be that due acceptance of the miscellaneous pleasures life offers, conduces to the capacity for enjoyment in posterity; and that persistence in dull monotonous lives by parents, diminishes the ability of their descendants to make the best of what gratifications fall to them.