I omitted the troublesome business of the possession of women, and the procreation of children, and the appointment of the rulers, because I knew that the perfect State would be eyed with jealousy and was difficult of attainment; but that piece of cleverness was not of much service to me, for I had to discuss them all the same. The women and children are now disposed of, but the other question of the rulers must be investigated from the very beginning. We were saying, as you will remember, that they were to be lovers of their country, tried by the test of pleasures and pains, and neither in hardships, nor in dangers, nor at any other critical moment were to lose their patriotism--he was to be rejected who failed, but he who always came forth pure, like gold tried in the refiner's fire, was to be made a ruler, and to receive honours and rewards in life and after death. This was the sort of thing which was being said, and then the argument turned aside and veiled her face; not liking to stir the question which has now arisen. I perfectly remember, he said. Yes, my friend, I said, and I then shrank from hazarding the bold word; but now let me dare to say--that the perfect guardian must be a philosopher. Yes, he said, let that be affirmed. And do not suppose that there will be many of them; for the gifts which were deemed by us to be essential rarely grow together; they are mostly found in shreds and patches. What do you mean? he said. You are aware, I replied, that quick intelligence, memory, sagacity, cleverness, and similar qualities, do not often grow together, and that persons who possess them and are at the same time high-spirited and magnanimous are not so constituted by nature as to live orderly and in a peaceful and settled manner; they are driven any way by their impulses, and all solid principle goes out of them. Very true, he said. On the other hand, those steadfast natures which can better be depended upon, which in a battle are impregnable to fear and immovable, are equally immovable when there is anything to be learned; they are always in a torpid state, and are apt to yawn and go to sleep over any intellectual toil. Quite true. And yet we were saying that both qualities were necessary in those to whom the higher education is to be imparted, and who are to share in any office or command. Certainly, he said. And will they be a class which is rarely found? Yes, indeed. Then the aspirant must not only be tested in those labours and dangers and pleasures which we mentioned before, but there is another kind of probation which we did not mention--he must be exercised also in many kinds of knowledge, to see whether the soul will be able to endure the highest of all, will faint under them, as in any other studies and exercises. Yes, he said, you are quite right in testing him. But what do you mean by the highest of all knowledge?