Page:1888 Cicero's Tusculan Disputations.djvu/468

 being carried with a more rapid velocity, moves with a shrill and acute sound; whereas that of the moon, being the lowest, moves with a very flat one. As to the earth, which makes the ninth sphere, it remains immovably fixed in the middle or lowest part of the universe. But those eight revolving circles, in which both Mercury and Venus are moved with the same celerity, give out sounds that are divided by seven distinct intervals, which is generally the regulating number of all things. This celestial harmony has been imitated by learned musicians both on stringed instruments and with the voice, whereby they have opened to themselves a way to return to the celestial regions, as have likewise many others who have employed their sublime genius while on earth in cultivating the divine sciences. By the amazing noise of this sound the ears of mankind have been in some degree deafened; and indeed hearing is the dullest of all the human senses. Thus, the people who dwell near the cataracts of the Nile, which are called Catadupa, are, by the excessive roar which that river makes in precipitating itself from those lofty mountains, entirely deprived of the sense of hearing. And so inconceivably great is this sound which is produced by the rapid motion of the whole universe, that the human ear is no more capable of receiving it than the eye is able to look steadfastly and directly on the sun, whose beams easily dazzle the strongest sight. While I was busied in admiring the scene of wonders, I could not help casting my eyes every now and then on the earth. XIX. On which Africanus said, I perceive that you are still employed in contemplating the seat and residence of mankind. But if it appears to you so small, as in fact it really is, despise its vanities, and fix your attention forever on these heavenly objects. Is it possible that you should attain any human applause or glory that is worth the contending for? The earth, you see, is peopled but in a very few places, and those, too, of small extent; and they appear like so many little spots of green scattered through vast, uncultivated deserts. And those who inhabit the