Bounding out of bed after an unbroken sleep, singing or whistling as he dresses, coming down with beaming face ready to laugh on the smallest provocation, the healthy man of high powers, conscious of past successes and by his energy, quickness, resource, made confident of the future, enters on the day's business not with repugnance, but with gladness; and from hour to hour experiencing satisfactions from work effectually done, comes home with an abundant surplus of energy remaining for hours of relaxation. Far otherwise is it with one who is enfeebled by great neglect of self. Already deficient, his energies are made more deficient by constant endeavors to execute tasks that prove beyond his strength, and by the resulting discouragement. Besides the depressing consciousness of the immediate future, there is the depressing consciousness of the remoter future, with its probability of accumulated difficulties and diminished ability to meet them. Hours of leisure which, rightly passed, bring pleasures that raise the tide of life and renew the powers of work, cannot be utilized: there is not vigor enough for enjoyments involving action, and lack of spirits prevents passive enjoyments from being entered upon with zest. In brief, life becomes a burden. Now if, as must be admitted, in a community composed of individuals like the first, the happiness will be relatively great, while in one composed of individuals like the last, there will be relatively little happiness, or rather much misery; it must be admitted that conduct causing the one result is good, and conduct causing the other is bad. But diminutions of general happiness are produced by inadequate egoism in several other ways. These we will successively glance at. § 71. If there were no proofs of heredity--if it were the rule that the strong are usually begotten by the weak, while the weak usually descend from the strong, that vivacious children form the families of melancholy parents, while fathers and mothers with overflowing spirits mostly have dull progeny, that from stolid peasants there ordinarily come sons of high intelligence while the sons of the cultured are commonly fit for nothing but following the plow--if there were no transmission of gout, scrofula, insanity, and did the diseased habitually give birth to the healthy and the healthy to the diseased, writers on Ethics might be justified in ignoring those effects of conduct which are felt by posterity through the natures they inherit.