The individual contribution, the work of any single generation, is infinitesimal; the power and glory belong to human society at large, and are the long result of selection, conservation, sacrifice, creation, and renewal - the outcome of endless brave efforts to conserve values and ideas, and to hand them on to posterity, along with physical life itself. Each person is a temporary focus of forces, vitalities, and values that carry back into an immemorial past and that reach forward into an unthinkable future.