Phaedo.Then, said Socrates, if there be such a thing as coming to life again, this would be the process of generation from the dead to the living?Certainly.So by this method also we reach the conclusion that the living are generated from the dead, just as much as the dead from the living; and since this is the case, it seems to me to be a sufficient proof that the souls of the dead exist somewhere, whence they come back to life.I think, Socrates, that results necessarily from our previous admissions.Now here is another method, Cebes, to prove, as it seems to me, that we were right in making those admissions. For if generation did not proceed from opposite to opposite and back again, going round, as it were in a circle, but always went forward in a straight line without turning back or curving, then, you know, in the end all things would have the same form and be acted upon in the same way and stop being generated at all.What do you mean? said he.It is not at all hard, said Socrates, to understand what I mean. For example, if the process of falling asleep existed, but not the opposite process of waking from sleep, in the end, you know, that would make the sleeping Endymion mere nonsense; he would be nowhere, for everything else would be in the same state as he, sound asleep. Or if all thing were mixed together and never separated, the saying of Anaxagoras, all things are chaos, would soon come true. And in like manner, my dear Cebes, if all things that have life should die, and, when they had died, the dead should remain in that condition, is it not inevitable that at last all things would be dead and nothing alive? For if the living were generated from any other things than from the dead, and the living were to die, is there any escape from the final result that all things would be swallowed up in death?I see none, Socrates, said Cebes. What you say seems to be perfectly true.I think, Cebes, said he, it is absolutely so, and we are not deluded in making these admissions, but the return to life is an actual fact, and it is a fact that the living are generated from the dead and that the souls of the dead exist.And besides, Cebes rejoined, if it is true, Socrates, as you are fond of saying, that our learning is nothing else than recollection, then this would be an additional argument that we must necessarily have learned in some previous time what we now remember.

Phaedo.But this is impossible if our soul did not exist somewhere before being born in this human form; and so by this argument also it appears that the soul is immortal.But, Cebes, said Simmias, what were the proofs of this? Remind me; for I do not recollect very well just now.Briefly, said Cebes, a very good proof is this: When people are questioned, if you put the questions well, they answer correctly of themselves about everything; and yet if they had not within them some knowledge and right reason, they could not do this. And that this is so is shown most clearly if you take them to mathematical diagrams or anything of that sort.And if you are not convinced in that way, Simmias, said Socrates, see if you don’t agree when you look at it in this way. You are incredulous, are you not, how that which is called learning can be recollection?I am not incredulous, said Simmias, but I want just what we are talking about, recollection. And from what Cebes undertook to say I already begin to recollect and be convinced; nevertheless, I should like to hear what you were going to say.It was this, said he. We agree, I suppose, that if anyone is to remember anything, he must know it at some previous time?Certainly, said he.Then do we agree to this also, that when knowledge comes in such a way, it is recollection? What I mean is this: If a man, when he has heard or seen or in any other way perceived a thing, knows not only that thing, but also has a perception of some other thing, the knowledge of which is not the same, but different, are we not right in saying that he recollects the thing of which he has the perception?What do you mean?Let me give an example. Knowledge of a man is different from knowledge of a lyre.Of course.Well, you know that a lover when he sees a lyre or a cloak or anything else which his beloved is wont to use, perceives the lyre and in his mind receives an image of the boy to whom the lyre belongs, do you not? But this is recollection, just as when one sees Simmias, one often remembers Cebes, and I could cite countless such examples.To be sure you could, said Simmias.Now, said he, is that sort of thing a kind of recollection? Especially when it takes place with regard to things which have already been forgotten through time and inattention?Certainly, he replied.Well, then, said Socrates, can a person on seeing a picture of a horse or of a lyre be reminded of a man, or on seeing a picture of Simmias be reminded of Cebes?Surely.

Phaedo.And on seeing a picture of Simmias he can be reminded of Simmias himself?Yes, said he.All these examples show, then, that recollection is caused by like things and also by unlike things, do they not?Yes.And when one has a recollection of anything caused by like things, will he not also inevitably consider whether this recollection offers a perfect likeness of the thing recollected, or not?Inevitably, he replied.Now see, said he, if this is true. We say there is such a thing as equality. I do not mean one piece of wood equal to another, or one stone to another, or anything of that sort, but something beyond that—equality in the abstract. Shall we say there is such a thing, or not? We shall say that there is, said Simmias, most decidedly.And do we know what it is?Certainly, said he.Whence did we derive the knowledge of it? Is it not from the things we were just speaking of? Did we not, by seeing equal pieces of wood or stones or other things, derive from them a knowledge of abstract equality, which is another thing? Or do you not think it is another thing? Look at the matter in this way. Do not equal stones and pieces of wood, though they remain the same, sometimes appear to us equal in one respect and unequal in another?Certainly.Well, then, did absolute equals ever appear to you unequal or equality inequality?No, Socrates, never.Then, said he, those equals are not the same as equality in the abstract.Not at all, I should say, Socrates.But from those equals, said he, which are not the same as abstract equality, you have nevertheless conceived and acquired knowledge of it?Very true, he replied.And it is either like them or unlike them?Certainly.It makes no difference, said he. Whenever the sight of one thing brings you a perception of another, whether they be like or unlike, that must necessarily be recollection.Surely.Now then, said he, do the equal pieces of wood and the equal things of which we were speaking just now affect us in this way: Do they seem to us to be equal as abstract equality is equal, or do they somehow fall short of being like abstract equality?They fall very far short of it, said he.Do we agree, then, that when anyone on seeing a thing thinks, This thing that I see aims at being like some other thing that exists, but falls short and is unable to be like that thing, but is inferior to it, he who thinks thus must of necessity have previous knowledge of the thing which he says the other resembles but falls short of? We must.Well then, is this just what happened to us with regard to the equal things and equality in the abstract?It certainly is.

Phaedo.Then we must have had knowledge of equality before the time when we first saw equal things and thought, ‘All these things are aiming to be like equality but fall short.’That is true.And we agree, also, that we have not gained knowledge of it, and that it is impossible to gain this knowledge, except by sight or touch or some other of the senses? I consider that all the senses are alike.Yes, Socrates, they are all alike, for the purposes of our argument.Then it is through the senses that we must learn that all sensible objects strive after absolute equality and fall short of it. Is that our view?Yes.Then before we began to see or hear or use the other senses we must somewhere have gained a knowledge of abstract or absolute equality, if we were to compare with it the equals which we perceive by the senses, and see that all such things yearn to be like abstract equality but fall short of it.That follows necessarily from what we have said before, Socrates.And we saw and heard and had the other senses as soon as we were born?Certainly.But, we say, we must have acquired a knowledge of equality before we had these senses?Yes.Then it appears that we must have acquired it before we were born.It does.Now if we had acquired that knowledge before we were born, and were born with it, we knew before we were born and at the moment of birth not only the equal and the greater and the less, but all such abstractions? For our present argument is no more concerned with the equal than with absolute beauty and the absolute good and the just and the holy, and, in short, with all those things which we stamp with the seal of absolute in our dialectic process of questions and answers; so that we must necessarily have acquired knowledge of all these before our birth.That is true.And if after acquiring it we have not, in each case, forgotten it, we must always be born knowing these things, and must know them throughout our life; for to know is to have acquired knowledge and to have retained it without losing it, and the loss of knowledge is just what we mean when we speak of forgetting, is it not, Simmias?Certainly, Socrates, said he.But, I suppose, if we acquired knowledge before we were born and lost it at birth, but afterwards by the use of our senses regained the knowledge which we had previously possessed, would not the process which we call learning really be recovering knowledge which is our own? And should we be right in calling this recollection?Assuredly.

Phaedo.For we found that it is possible, on perceiving a thing by the sight or the hearing or any other sense, to call to mind from that perception another thing which had been forgotten, which was associated with the thing perceived, whether like it or unlike it; so that, as I said, one of two things is true, either we are all born knowing these things and know them all our lives, or afterwards, those who are said to learn merely remember, and learning would then be recollection.That is certainly true, Socrates.Which then do you choose, Simmias? Were we born with the knowledge, or do we recollect afterwards things of which we had acquired knowledge before our birth?I cannot choose at this moment, Socrates.How about this question? You can choose and you have some opinion about it: When a man knows, can he give an account of what he knows or not?Certainly he can, Socrates.And do you think that everybody can give an account of the matters about which we have just been talking?I wish they might, said Simmias; but on the contrary I fear that tomorrow, at this time, there will be no longer any man living who is able to do so properly. Then, Simmias, you do not think all men know these things?By no means.Then they recollect the things they once learned?Necessarily.When did our souls acquire the knowledge of them? Surely not after we were born as human beings.Certainly not.Then previously.Yes.Then, Simmias, the souls existed previously, before they were in human form, apart from bodies, and they had intelligence.Unless, Socrates, we acquire these ideas at the moment of birth; for that time still remains.Very well, my friend. But at what other time do we lose them? For we are surely not born with them, as we just now agreed. Do we lose them at the moment when we receive them, or have you some other time to suggest?None whatever, Socrates. I did not notice that I was talking nonsense.Then, Simmias, said he, is this the state of the case? If, as we are always saying, the beautiful exists, and the good, and every essence of that kind, and if we refer all our sensations to these, which we find existed previously and are now ours, and compare our sensations with these, is it not a necessary inference that just as these abstractions exist, so our souls existed before we were born; and if these abstractions do not exist, our argument is of no force? Is this the case, and is it equally certain that provided these things exist our souls also existed before we were born, and that if these do not exist, neither did our souls?