In the republics of Greece and Rome, the art of speaking was the powerful engine of patriotism or ambition; and the schools of rhetoric poured forth a colony of statesmen and legislators.

When the liberty of public debate was suppressed, the orator, in the honorable profession of an advocate, might plead the cause of innocence and justice; he might abuse his talents in the more profitable trade of panegyric; and the same precepts continued to dictate the fanciful declamations of the sophist, and the chaster beauties of historical composition.

The systems which professed to unfold the nature of God, of man, and of the universe, entertained the curiosity of the philosophic student; and according to the temper of his mind, he might doubt with the Sceptics, or decide with the Stoics, sublimely speculate with Plato, or severely argue with Aristotle.

The pride of the adverse sects had fixed an unattainable term of moral happiness and perfection; but the race was glorious and salutary; the disciples of Zeno, and even those of Epicurus, were taught both to act and to suffer; and the death of Petronius was not less effectual than that of Seneca, to humble a tyrant by the discovery of his impotence.

The light of science could not indeed be confined within the walls of Athens.