Further, we accustom them to running, both of the long distance and of the sprinting kind. And they have to run not on hard ground with a good footing, but in deep sand on which you can neither tread firmly nor get a good push off, the foot sinking in. Then, to fit them to leap a trench or other obstacle, we make them practise with leaden dumb-bells in their hands. And again there are distance matches with the javelin. Yes, and you saw in the gymnasium a bronze disk like a small buckler, but without handle or straps; you tried it as it lay there, and found it heavy and, owing to its smooth surface, hard to handle. Well, that they hurl upwards and forwards, trying who can get furthest and outdo his competitors—an exercise that strengthens the shoulders and braces the fingers and toes. As to the clay and dust that first moved your laughter, I will tell you now why they are provided. In the first place, that a fall may be not on a hard surface, but soft and safe. Secondly, greater slipperiness is secured by sweat and clay combined (you compared them to eels, you remember); now this is neither useless nor absurd, but contributes appreciably to strength and activity. An adversary in that condition must be gripped tightly enough to baffle his attempts at escape. To lift up a man who is all over clay, sweat, and oil, and who is doing his very best to get away and slip through your fingers, is no light task, I assure you. And I repeat that all these things have their military uses too: you may want to take up a wounded friend and convey him out of danger; you may want to heave an enemy over your head and make off with him. So we give them still harder tasks in training, that they may be abundantly equal to the less. The function we assign to dust is just the reverse, to prevent one who is gripped from getting loose. After learning in the clay to retain their hold on the elusive, they are accustomed in turn to escape themselves even from a firm grasp. Also, we believe the dust forms a plaster that keeps in excessive sweat, prevents waste of power, and obviates the ill effects of the wind playing upon a body when its pores are all relaxed and open. Besides which, it cleanses the skin and makes it glossy. I should like to put side by side one of the white creatures who live sheltered lives and, after washing off his dust and clay, any of the Lyceum frequenters you should select, and then ask you which you would rather resemble. I know you would make your choice at the first glance, without waiting to see what they could do; you would rather be solid and well-knit than delicate and soft and white for want of the blood that had hidden itself away out of sight.