involving the human intellect in Cimmerian darkness. In our own country, however, though no one appears to have wholly devoted himself to the study of this philosophy, and he who does not will never penetrate its depths, yet we have a few bright examples of no common proficiency in its more accessible parts. ----------------- [15] I never yet knew a man who made experiment the test of truth, and I have known many such, that was not atheistically inclined. [16] I have ranked Archimedes among the Platonists, because he cultivated the mathematical sciences Platonically, as is evident from the testimony of Plutarch in his Life of Marcellus, p. 307. For he there informs us that Archimedes considered the being busied about mechanics, and in short, every art which is connected with the common purposes of life, as ignoble and illiberal; and that those things alone were objects of his ambition with which the beautiful and the excellent were present, unmingled with the necessary. The great accuracy and elegance in the demonstrations of Euclid and Archimedes, which have not been equaled by any of our greatest modern mathematicians, were derived from a deep conviction of this important truth. On the other hand modern mathematicians, through a profound ignorance of this divine truth, and looking to nothing but the wants and conveniences of the animal life of man, as if the gratification of his senses was his only end, have corrupted pure geometry, by mingling with it algebraical calculations, and through eagerness to reduce it as much as possible to practical purposes, have more anxiously sought after conciseness than accuracy, facility than elegance of geometrical demonstration. ----------------- The instances I allude to are Shaftesbury, Akenside, Harris, Petwin, and Sydenham. So splendid is the specimen of philosophic abilities displayed by these writers, like the fair dawning of same unclouded morning, that we have only deeply to regret that the sun of their genius sat before we were gladdened with its effulgence. Had it shone with its full strength, the writer of this Introduction would not have attempted either to translate the works, or elucidate the doctrines of Plato; but though it rose with vigor, it dispersed not the clouds in which its light was gradually involved, and the eye in vain anxiously waited for it's meridian beam. In short, the principles of the philosophy of Plato are of all others the most friendly to true piety, pure morality, solid learning, and sound government. For as it is scientific in all its parts, and in these parts comprehends all that can be known by man in theology and ethics, and all that is necessary for him to know in physics, it must consequently contain in itself the source of all that is great and good both to individuals and communities, must necessarily exalt while it benefits, and deify while it exalts.