The passage is curious, and deserves to be given in its full context. Socrates is sitting in the Palaestra, or gymnasium, with his friend Critias, admiring the atheletes. He is particularly struck by the beauty of one of them, Charmides, who proves to be a young cousin of Critias, who is persuaded to send for him:
Very well, he said; then I will call him; and turning to the attendant, he said, Call Charmides, and tell him that I want him to come and see a physician about the illness of which he spoke to me the day before yesterday. Then again addressing me, he added: He has been complaining lately of having a headache when he rises in the morning: now why should you not make him believe that you know a cure for the headache?

Why not, I said; but will he come?

He will be sure to come, he replied.

He came as he was bidden, and sat down between Critias and me. Great amusement was occasioned by every one pushing with might and main at his neighbour in order to make a place for him next to themselves, until at the two ends of the row one had to get up and the other was rolled over sideways. Now my friend, was beginning to feel awkward; former bold belief in my powers of conversing with him had vanished. And when Critias told him that I was the person who had the cure, he looked at me in such an indescribable manner, and was just going to ask a question. And at that moment all the people in the palaestra crowded about us, and, O rare! I caught a sight of the inwards of his garment, and took the flame. Then I could no longer contain myself. I thought how well Cydias understood the nature of love, when, in speaking of a fair youth, he warns some one ``not to bring the fawn in the sight of the lion to be devoured by him,'' for I felt that I had been overcome by a sort of wild-beast appetite. But I controlled myself, and when he asked me if I knew the cure of the headache, I answered, but with an effort, that I did know.

And what is it? he said.

I replied that it was a kind of leaf, which required to be accompanied by a charm, and if a person would repeat the charm at the same time that he used the cure, he would be made whole; but that without the charm the leaf would be of no avail.

Then I will write out the charm from your dictation, he said.

With my consent? I said, or without my consent?

With your consent, Socrates, he said, laughing.

Very good, I said; and are you quite sure that you know my name?

I ought to know you, he replied, for there is a great deal said about you among my companions; and I remember when I was a child seeing you in company with my cousin Critias.

I am glad to find that you remember me, I said; for I shall now be more at home with you and shall be better able to explain the nature of the charm, about which I felt a difficulty before. For the charm will do more, Charmides, than only cure the headache. I dare say that you have heard eminent physicians say to a patient who comes to them with bad eyes, that they cannot cure his eyes by themselves, but that if his eyes are to be cured, his head must be treated; and then again they say that to think of curing the head alone, and not the rest of the body also, is the height of folly. And arguing in this way they apply their methods to the whole body, and try to treat and heal the whole and the part together. Did you ever observe that this is what they say?

Yes, he said.

And they are right, and you would agree with them?

Yes, he said, certainly I should.

His approving answers reassured me, and I began by degrees to regain confidence, and the vital heat returned. Such, Charmides, I said, is the nature of the charm, which I learned when serving with the army from one of the physicians of the Thracian king Zamolxis, who are to be so skilful that they can even give immortality. This Thracian told me that in these notions of theirs, which I was just now mentioning, the Greek physicians are quite right as far as they go; but Zamolxis, he added, our king, who is also a god, says further, ``that as you ought not to attempt to cure the eyes without the head, or the head without the body, so neither ought you to attempt to cure the body without the soul; and this,'' he said, ``is the reason why the cure of many diseases is unknown to the physicians of Hellas, because they are ignorant of the whole, which ought to be studied also; for the part can never be well unless the whole is well.'' For all good and evil, whether in the body or in human nature, originates, as he declared, in the soul, and overflows from thence, as if from the head into the eyes. And therefore if the head and body are to be well, you must begin by curing the soul; that is the first thing. And the cure, my dear youth, has to be effected by the use of certain charms, and these charms are fair words; and by them temperance is implanted in the soul, and where temperance is, there health is speedily imparted, not only to the head, but to the whole body. And he who taught me the cure and the charm at the same time added a special direction: ``Let no one,'' he said, ``persuade you to cure the head, until he has first given you his soul to be cured by the charm. For this,'' he said, ``is the great error of our day in the treatment of the human body, that physicians separate the soul from the body.'' And he added with emphasis, at the same time making me swear to his words, ``Let no one, however rich, or noble, or fair, persuade you to give him the cure, without the charm.'' Now I have sworn, and I must keep my oath, and therefore if you will allow me to apply the Thracian charm first to your soul, as the stranger directed, I will afterwards proceed to apply the cure to your head. But if not, I do not know what I am to do with you, my dear Charmides.

Critias, when he heard this, said: The headache will be an unexpected gain to my young relation, if the pain in his head compels him to improve his mind: and I can tell you, Socrates, that Charmides is not only pre-eminent in beauty among his equals, but also in that quality which is given by the charm; and this, as you say, is temperance?

Yes, I said.

Then let me tell you that he is the most temperate of human beings, and for his age inferior to none in any quality.

Yes, I said, Charmides; and indeed I think that you ought to excel others in all good qualities; for if I am not mistaken there is no one present who could easily point out two Athenian houses, whose union would be likely to produce a better or nobler scion than the two from which you are sprung. There is your father's house, which is descended from Critias the son of Dropidas, whose family has been commemorated in the panegyrical verses of Anacreon, Solon, and many other poets, as famous for beauty and virtue and all other high fortune: and your mother's house is equally distinguished; for your maternal uncle, Pyrilampes, is reputed never to have found his equal, in Persia at the court of the great king, or on the continent of Asia, in all the places to which he went as ambassador, for stature and beauty; that whole family is not a whit inferior to the other. Having such ancestors you ought to be first in all things, and, sweet son of Glaucon, your outward form is no dishonour to any of them. If to beauty you add temperance, and if in other respects you are what Critias declares you to be, then, dear Charmides, blessed art thou, in being the son of thy mother. And here lies the point; for if, as he declares, you have this gift of temperance already, and are temperate enough, in that case you have no need of any charms, whether of Zamolxis or of Abaris the Hyperborean, and I may as well let you have the cure of the head at once; but if you have not yet acquired this quality, I must use the charm before I give you the medicine. Please, therefore, to inform me whether you admit the truth of what Critias has been saying;-have you or have you not this quality of temperance?

Charmides blushed, and the blush heightened his beauty, for modesty is becoming in youth; he then said very ingenuously, that he really could not at once answer, either yes, or no, to the question which I had asked: For, said he, if I affirm that I am not temperate, that would be a strange thing for me to say of myself, and also I should give the lie to Critias, and many others who think as he tells you, that I am temperate: but, on the other hand, if I say that I am, I shall have to praise myself, which would be ill manners; and therefore I do not know how to answer you.

And from here the dialogue goes into the usual Socratic game of trying (and failing) to define temperence. One may thus reasonably question whether Plato attached as much importance to the arts of Zamolxis and Abaris as Mirandola seems to believe.