In order to elevate and perfect the soul, it is not sufficient only to apply ourselves to the practice of moral virtues and to learning; we must also endeavour to understand God, the Author of the universe. Therefore, let men enter into the temples, and prostrate themselves before God according to the forms and rites of worship in which they have been reared. All religions are good, and ought to be respected, because they permit us to pay the homage of gratitude and heartfelt submission to the Author of nature. The Christian religion is good, because it is a religion. The religion of Mahomet is good, because it is a religion. For the same reason Buddhism and Judaism are good, and the religion of the wild Indians who worship the sun in the depths of their forests. The fourth practical rule which we derive from the principles and theories which we have laid down, is that the remembrance and commemoration of the dead should be preserved. Let us not efface from our hearts the memory of those whom death has snatched from us. To forget them is to cause them the most cruel anguish, and to deprive ourselves of the aid and guidance which they can give us here below. The ancients sedulously kept up the memory of the dead. They did not put the idea of death away from them with terror, like the modern peoples; on the contrary, they loved to invoke it. Among the Greeks and Romans the cemeteries were places of meeting, used for festivals and promenades. The Orientals of our days preserve this ancient tradition. Their cemeteries are perfectly kept gardens, whither festive crowds resort on festal occasions. They visit the relatives and friends who are buried in the shrubberies and the flower-beds, and revel in the pleasures of life amid the pretty dwelling-places of the dead. In Europe we know nothing of this wholesome philosophy. But we may remark, that peasants, unlike dwellers in cities, who are not brought into familiar daily contact with nature, are far from shunning the idea of death, or avoiding the cemeteries where their relatives and friends rest. They recall the remembrance of their dead, they speak to them, they question them, they consult them, as though they were still seated by the family fireside. The custom of funeral repasts, which dates from the time of primitive man, is still observed in several countries. On returning from the cemetery the company seat themselves before a well-spread table, in the house of the deceased, and wish him a happy journey to the land of shadows. In our cities, it is "_the people_" who hold it a duty to carry flowers to the graves of their relatives. Among the higher classes of society people hold themselves exempt, in general, from this pious care, and they are wrong. Piety towards the dead, and reverent commemoration of them, are prescribed by the laws of nature.