In every age and country of the world men must have attended to the characters, designs, and actions of one another, and many reputable rules and maxims for the conduct of human life must have been laid down and approved of by common consent. As soon as writing came into fashion, wise men, or those who fancied themselves such, would naturally endeavor to increase the number of those established and respected maxims, and to express their own sense of what was either proper or improper conduct, sometimes in the more artificial form of apologues, like what are called the fables of Æsop; and sometimes in the more simple one of apothegms, or wise sayings, like the Proverbs of Solomon, the verses of Theognis and Phocyllides, and some part of the works of Hesiod. They might continue in this manner for a long time merely to multiply the number of those maxims of prudence and morality without even attempting to arrange them in any very distinct or methodical order, much less to connect them together by one or more general principles, from which they were all deducible, like effects from their natural causes. The beauty of a systematical arrangement of different observations connected by a few common principles, was first seen in the rude essays of those ancient times toward a system of natural philosophy. Something of the same kind was afterward attempted in morals. The maxims of common life were arranged in some methodical order, and connected together by a few common principles, in the same manner as they had attempted to arrange and connect the phenomena of nature. The science which pretends to investigate and explain those connecting principles, is what is properly called moral philosophy.
