Among the Greeks there were no sacred books like the Hindu Vedas or Hebrew Scriptures, in which the people could learn duties and religious truths. The priests taught nothing; they merely officiated at rites and ceremonies. It is difficult to find out what were the means and forms of religious instruction, so far as pertained to the heart and conscience. Duties were certainly not learned from the ministers of religion. From what source did the people learn the necessity of obedience to parents, of conjugal fidelity, of truthfulness, of chastity, of honesty? It is difficult to tell. The poets and artists taught ideas of beauty, of grace, of strength; and Nature in her grandeur and loveliness taught the same things. Hence a severe taste was cultivated, which excluded vulgarity and grossness in the intercourse of life. It was the rule to be courteous, affable, gentlemanly, for all this was in harmony with the severity of art. The comic poets ridiculed pretension, arrogance, quackery, and lies. Patriotism, which was learned from the dangers of the State, amid warlike and unscrupulous neighbors, called out many manly virtues, like courage, fortitude, heroism, and self-sacrifice. A hard and rocky soil necessitated industry, thrift, and severe punishment on those who stole the fruits of labor, even as miners in the Rocky Mountains sacredly abstain from appropriating the gold of their fellow-laborers. Self-interest and self-preservation dictated many laws which secured the welfare of society. The natural sacredness of home guarded the virtue of wives and children; the natural sense of justice raised indignation against cheating and tricks in trade. Men and women cannot live together in peace and safety without observing certain conditions, which may be ranked with virtues even among savages and barbarians,--much more so in cultivated and refined communities. The graces and amenities of life can exist without reference to future rewards and punishments. The ultimate law of self-preservation will protect men in ordinary times against murder and violence, and will lead to public and social enactments which bad men fear to violate. A traveller ordinarily feels as safe in a highly-civilized pagan community as in a Christian city. The "heathen Chinee" fears the officers of the law as much as does a citizen of London.