Page:1888 Cicero's Tusculan Disputations.djvu/32

 M. I commend you; for, indeed, I could myself willingly be mistaken in his company. Do we, then, doubt, as we do in other cases (though I think here is very little room for doubt in this case, for the mathematicians prove the facts to us), that the earth is placed in the midst of the world, being, as it were, a sort of point, which they call a κέντρον, surrounded by the whole heavens; and that such is the nature of the four principles which are the generating causes of all things, that they have equally divided among them the constituents of all bodies; moreover, that earthy and humid bodies are carried at equal angles by their own weight and ponderosity into the earth and sea; that the other two parts consist, one of fire, and the other of air? As the two former are carried by their gravity and weight into the middle region of the world, so these, on the other hand, ascend by right lines into the celestial regions, either because, owing to their intrinsic nature, they are always endeavoring to reach the highest place, or else because lighter bodies are naturally repelled by heavier; and as this is notoriously the case, it must evidently follow that souls, when once they have departed from the body, whether they are animal (by which term I mean capable of breathing) or of the nature of fire, must mount upward. But if the soul is some number, as some people assert, speaking with more subtlety than clearness, or if it is that fifth nature, for which it would be more correct to say that we have not given a name to than that we do not correctly understand it–still it is too pure and perfect not to go to a great distance from the earth. Something of this sort, then, we must believe the soul to be, that we may not commit the folly of thinking that so active a principle lies immerged in the heart or brain; or, as Empedocles would have it, in the blood.

XVIII. We will pass over Dicæarchus, with his contemporary and fellow-disciple Aristoxenus, both indeed