[17]“The Pythagoreans,” says Simplicius, in his Commentary on the 2d book of Aristotle’s treatise On the Heavens, said, “that an harmonic sound was produced from the motion of the celestial bodies, and they scientifically collected this from the analogy of their intervals; since not only the ratios of the sun and moon, of Venus and Mercury, but also of the other stars, were discovered by them.” Simplicius adds, “Perhaps the objection of Aristotle to this assertion of the Pythagoreans, may be solved according to the philosophy of those men, as follows: “All things are not commensurate with each other, nor is every thing sensible to every thing, even in the sublunary region. This is evident from dogs who scent animals at a great distance, and which are not smelt by men. How much more, therefore, in things which are separated by so great an interval as those which are incorruptible from the corruptible, and celestial from terrestrial natures, is it true to say, that the sound of divine bodies is not audible by terrestrial ears? But if any one like Pythagoras, who is reported to have heard this harmony, should have his terrestrial body exempt from him, and his luminous and celestial vehicle[17a] and the senses which it contains purified, either through a good allotment, or through probity of life, or through a perfection arising from sacred operations, such a one will perceive things invisible to others, and will hear things inaudible by others. With respect to divine and immaterial bodies, however, if any sound is produced by them, it is neither percussive nor destructive, but it excites the powers and energies of sublunary sounds, and perfects the sense which is co-ordinate with them. It has also a certain analogy to the sound which concurs with the motion of terrestrial bodies. But the sound which is with us in consequence of the sonorific nature of the air, is a certain energy of the motion of their impassive sound. If, then, air is not passive there, it is evident that neither will the sound which is there be passive. Pythagoras, however, seems to have said that he heard the celestial harmony, as understanding the harmonic proportions in numbers, of the heavenly bodies, and that which is audible in them. Some one, however, may very properly doubt why the stars are seen by our visive sense, but the sound of them is not heard by our ears? To this we reply that neither do we see the stars themselves; for we do not see their magnitudes, or their figures, or their surpassing beauty. Neither do we see the motion through which the sound is produced; but we see as it were such an illumination of them, as that of the light of the sun about the earth, the sun himself not being seen by us. Perhaps too, neither will it be wonderful, that the visive sense, as being more