When Socrates had thus spoken, Cebes, taking up the discussion, said “Socrates, all the rest appears to me to be said rightly, but what you have said respecting the soul will occasion much incredulity in many from the apprehension that when it is separated from the body it no longer exists anywhere, but is destroyed and perishes on the very day in which a man dies, and that immediately it is separated and goes out from the body it is dispersed, and vanishes like breath or smoke, and is no longer anywhere, since if it remained anywhere united in itself, and freed from those evils which you have just now enumerated, there would be an abundant and good hope, Socrates, that what you say is true 40.  But this probably needs no little persuasion and proof, that the soul of a man who dies exists, and possesses activity and intelligence.”

“You say truly, Cebes,” said Socrates, “but what shall we do?  Are you willing that we should converse on these points, whether such is probably the case or not?”

“Indeed,” replied Cebes, “I should gladly hear your opinion on these matters.”

“I do not think,” said Socrates, “that any one who should now hear us, even though he were a comic poet, would say that I am talking idly, or discoursing on subjects that do not concern me.  If you please, then, we will examine into it.  Let us consider it in this point of view, whether the souls of men who are dead exist in Hades, or not.  This is an ancient saying, which we now call to mind, that souls departing hence exist there, and return hither again, and are produced from the dead. 41.  And if this is so, that the living are produced again from the dead, can there be any other consequence than that our souls are there? for surely they could not be produced again if they did not exist; and this would be sufficient proof that these things are so, if it should in reality be evident that the living are produced from no other source than the dead.  But if this is not the case, there will be need of other arguments.”

“Certainly,” said Cebes.

“You must not, then,” he continued, “consider this only with respect to men, if you wish to ascertain it with greater certainty, but also with respect to all animals and plants, and, in a word, with respect to every thing that is subject to generation.  Let us see whether they are not all so produced, no otherwise than contraries from contraries, wherever they have any such quality; as, for instance, the honorable is contrary to the base, and the just to the unjust, and so with ten thousand other things. 42.  Let us consider this, then, whether it is necessary that all things which have a contrary should be produced from nothing else than their contrary.  As, for instance, when any thing becomes greater, is it not necessary that, from being previously smaller, it afterward became greater?”

“Yes.”

“And if it becomes smaller, will it not, from being previously greater, afterward become smaller?”