Note 22 — Introduction To The Phædo.

This, then, being conceded by Cebes, Socrates22 argues that every thing that is beautiful is so from partaking of abstract beauty, and great from partaking of magnitude, and little from partaking of littleness. Now, it is impossible, he argues, that contraries can exist in the same thing at the same time; for instance, the same thing can not possess both magnitude and littleness, but one will withdraw at the approach of the other; and not only so, but things which, though not contrary to each other, yet always contain contraries within themselves, can not co-exist; for instance, the number three has no contrary, yet it contains within itself the idea of odd, which is the contrary of even, and so three never can become even; in like manner, heat while it is heat can never admit the idea of its contrary, cold. Now, if this method of reasoning is applied to the soul, it will be found to be immortal; for life and death are contraries, and never can co-exist; but wherever the soul is, there is life: so that it contains within itself that which is contrary to death, and consequently can never admit of death; therefore it is immortal.