All nature teaches that no good thing which has once been done passes utterly away. The living are ever reminded of the buried millions who have worked and won before them. The handicraft and skill displayed in the buildings and sculptures of the long-lost cities of Nineveh, Babylon, and Troy, have descended to the present time. In nature's economy, no human labour is altogether lost. Some remnant of useful effect continues to reward the race, if not the individual. The mere material wealth bequeathed to us by our forefathers forms but an insignificant item in the sum of our inheritance. Our birthright is made up of something far more imperishable. It consists of the sum of the useful effects of human skill and labour. These effects were not transmitted by learning, but by teaching and example. One generation taught another, and thus art and handicraft, the knowledge of mechanical appliances and materials, continued to be preserved. The labours and efforts of former generations were thus transmitted by father to son; and they continue to form the natural heritage of the human race--one of the most important instruments of civilization. Our birthright, therefore, consists in the useful effects of the labours of our forefathers; but we cannot enjoy them unless we ourselves take part in the work. All must labour, either with hand or head. Without work, life is worthless; it becomes a mere state of moral coma. We do not mean merely physical work. There is a great deal of higher work--the work of action and endurance, of trial and patience, of enterprise and philanthropy, of spreading truth and civilization, of diminishing suffering and relieving the poor, of helping the weak, and enabling them to help themselves. "A noble heart," says Barrow, "will disdain to subsist, like a drone, upon others' labours; like a vermin to filch its food out of the public granary; or, like a shark, to prey upon the lesser fry; but it will rather outdo his private obligations to other men's care and toil, by considerable service and beneficence to the public; for there is no calling of any sort, from the sceptre to the spade, the management whereof, with any good success, any credit, any satisfaction, doth not demand much work of the head, or of the hands, or of both." Labour is not only a necessity, but it is also a pleasure. What would otherwise be a curse, by the constitution of our physical system becomes a blessing. Our life is a conflict with nature in some respects, but it is also a co-operation with nature in others. The sun, the air, and the earth are constantly abstracting from us our vital forces. Hence we eat and drink for nourishment, and clothe ourselves for warmth.