"The adequately egoistic individual retains those powers which make altruistic activities possible. The individual who is inadequately egoistic loses more or less of his ability to be altruistic. The truth of the one proposition is self-evident; and the truth of the other is daily forced on us by examples. Note a few of them. Here is a mother who, brought up in the insane fashion usual among the cultivated, has a physique not strong enough for suckling her infant, but who, knowing that its natural food is the best, and anxious for its welfare, continues to give milk for a longer time than her system will bear. Eventually the accumulating reaction tells. There comes exhaustion running, it may be, into illness caused by depletion; occasionally ending in death, and often entailing chronic weakness. She becomes, perhaps for a time, perhaps permanently, incapable of carrying on household affairs; her other children suffer from the loss of maternal attention; and where the income is small, payments for nurse and doctor tell injuriously on the whole family. Instance, again, what not unfrequently happens with the father. Similarly prompted by a high sense of obligation, and misled by current moral theories into the notion that self-denial may rightly be carried to any extent, he daily continues his office work for long hours regardless of hot head and cold feet; and debars himself from social pleasures, for which he thinks he can afford neither time nor money. What comes of this entirely unegoistic course? Eventually a sudden collapse, sleeplessness, inability to work. That rest which he would not give himself when his sensations prompted he has now to take in long measure. The extra earnings laid by for the benefit of his family are quickly swept away by costly journeys in aid of recovery and by the many expenses which illness entails. Instead of increased ability to do his duty by his offspring there comes now inability. Lifelong evils on them replace hoped-for goods. And so is it, too, with the social effects of inadequate egoism. All grades furnish examples of the mischiefs, positive and negative, inflicted on society by excessive neglect of self. Now the case is that of a labourer who, conscientiously continuing his work under a broiling sun, spite of violent protests from his feelings, dies of sunstroke; and leaves his family a burden to the parish. Now the case is that of a clerk whose eyes permanently fail from overstraining, or who, daily writing for hours after his fingers are painfully cramped, is attacked with 'scrivener's palsy,' and, unable to write at all, sinks with aged parents into poverty which friends are called on to mitigate. "And now the case is that of a man devoted to public ends who, shattering his health by ceaseless application, fails to achieve all he might have achieved by a more reasonable apportionment of his time between labour on behalf of others, and ministration to his own needs."