[146] for musical precepts, to take them for an instance, or rules of [102] grammar, or of geometry, or of justice, or of wisdom, or of manly courage, or of temperance, are very numerous indeed; but the science itself of music, or grammar, or geometry, and still more the virtue of justice, or temperance, or wisdom, or manly courage, is only one thing, the loftiest perfection, in no respect differing from the archetypal model, after which all those numerous and countless precepts were formed.