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 Dicaearchus,[11] with his contemporary and fellow-disciple Aristoxenus,[12] both indeed men of learning.

One of them seems never even to have been affected with grief, as he could not perceive that he had a soul; while the other is so pleased with his musical compositions that he endeavors to show an analogy betwixt them and souls.

Now, we may understand harmony to arise from the intervals of sounds, whose various compositions occasion many harmonies; but I do not see how a disposition of members, and the figure of a body without a soul, can occasion harmony.