Yes, Socrates, he said; the conclusion seems to flow necessarily out of our previous admissions.
And that these admissions were not unfair, Cebes, he said, may be shown, I think, as follows: If generation were in a straight line only, and there were no compensation or circle in nature, no turn or return of elements into their opposites, then you know that all things would at last have the same form and pass into the same state, and there would be no more generation of them.
What do you mean? he said.
A simple thing enough, which I will illustrate by the case of sleep, he replied. You know that if there were no alternation of sleeping and waking, the tale of the sleeping Endymion would in the end have no meaning, because all other things would be asleep, too, and he would not be distinguishable from the rest. Or if there were composition only, and no division of substances, then the chaos of Anaxagoras would come again. And in like manner, my dear Cebes, if all things which partook of life were to die, and after they were dead remained in the form of death, and did not come to life again, all would at last die, and nothing would be alive—what other result could there be? For if the living spring from any other things, and they too die, must not all things at last be swallowed up in death? (But compare Republic.)
There is no escape, Socrates, said Cebes; and to me your argument seems to be absolutely true.
Yes, he said, Cebes, it is and must be so, in my opinion; and we have not been deluded in making these admissions; but I am confident that there truly is such a thing as living again, and that the living spring from the dead, and that the souls of the dead are in existence, and that the good souls have a better portion than the evil.
Cebes added: Your favorite doctrine, Socrates, that knowledge is simply recollection, if true, also necessarily implies a previous time in which we have learned that which we now recollect. But this would be impossible unless our soul had been in some place before existing in the form of man; here then is another proof of the soul's immortality.
But tell me, Cebes, said Simmias, interposing, what arguments are urged in favour of this doctrine of recollection. I am not very sure at the moment that I remember them.
One excellent proof, said Cebes, is afforded by questions. If you put a question to a person in a right way, he will give a true answer of himself, but how could he do this unless there were knowledge and right reason already in him? And this is most clearly shown when he is taken to a diagram or to anything of that sort. (Compare Meno.)
But if, said Socrates, you are still incredulous, Simmias, I would ask you whether you may not agree with me when you look at the matter in another way;—I mean, if you are still incredulous as to whether knowledge is recollection.