§ 72. Beyond the decrease of general happiness which results in this indirect way, if egoism is unduly subordinated, there is a decrease of general happiness which results in a direct way. He who carries self-regard far enough to keep himself in good health and high spirits, in the first place, thereby becomes an immediate source of happiness to those around, and, in the second place, maintains the ability to increase their happiness by altruistic actions. But one whose bodily vigor and mental health are undermined by self-sacrifice carried too far, in the first place becomes to those around a cause of depression, and, in the second place, renders himself incapable, or less capable, of actively furthering their welfare. In estimating conduct we must remember that there are those who by their joyousness beget joy in others, and that there are those who by their melancholy cast a gloom on every circle they enter. And we must remember that by display of overflowing happiness a man of the one kind may add to the happiness of others more than by positive efforts to benefit them, and that a man of the other kind may decrease their happiness more by his presence than he increases it by his actions. Full of vivacity the one is ever welcome. For his wife he has smiles and jocose speeches; for his children stores of fun and play; for his friends pleasant talk interspersed with the sallies of wit that come from buoyancy. Contrariwise, the other is shunned. The irritability resulting now from ailments, now from failures caused by feebleness, his family has daily to bear. Lacking adequate energy for joining in them, he has at best but a tepid interest in the amusements of his children, and he is called a wet blanket by his friends. Little account as our ethical reasonings take note of it, yet is the fact obvious that since happiness and misery are infectious, such regard for self as conduces to health and high spirits is a benefaction to others, and such disregard of self as brings on suffering, bodily or mental, is a malefaction to others. The duty of making one's self agreeable by seeming to be pleased, is, indeed, often urged, and thus to gratify friends is applauded so long as self-sacrificing effort is implied. But though display of real happiness gratifies friends far more than display of sham happiness, and has no drawback in the shape either of hypocrisy or strain, yet it is not thought a duty to fulfill the conditions which favor the display of real happiness. Nevertheless, if quantity of happiness produced is to be the measure, the last is more imperative than the first.