Sphinx has no more than two kinds of riddles, one relating to the nature of things, the other to the nature of man; and correspondent to these, the prizes of the solution are two kinds of empire,—the empire over nature, and the empire over man. For the true and ultimate end of natural philosophy is dominion over natural things, natural bodies, remedies, machines, and numberless other particulars, though the schools, contented with what spontaneously offers, and swollen with their own discourses, neglect, and in a manner despise, both things and works. But the riddle proposed to Œdipus, the solution whereof acquired him the Theban kingdom, regarded the nature of man; for he who has thoroughly looked into and examined human nature, may in a manner command his own fortune, and seems born to acquire dominion and rule. Accordingly, Virgil properly makes the arts of government to be the arts of the Romans.[647] It was, therefore, extremely apposite in Augustus Cæsar to use the image of Sphinx in his signet, whether this happened by accident or by design; for he of all men was deeply versed in politics, and through the course of his life very happily solved abundance of new riddles with regard to the nature of man; and unless he had done this with great dexterity and ready address, he would frequently have been involved in imminent danger, if not destruction. It is with the utmost elegance added in the fable, that when Sphinx was conquered, her carcass was laid upon an ass; for there is nothing so subtile and abstruse, but after being once made plain, intelligible, and common, it may be received by the slowest capacity. We must not omit that Sphinx was conquered by a lame man, and impotent in his feet; for men usually make too much haste to the solution of Sphinx’s riddles; whence it happens, that she prevailing, their minds are rather racked and torn by disputes, than invested with command by works and effects. XXIX.—PROSERPINE, OR SPIRIT. EXPLAINED OF THE SPIRIT INCLUDED IN NATURAL BODIES.