Philo Judaeus Quod Omnis Probus Liber Sit 26

I have before now seen among the competitors in the pancratium, at the public games, one man inflicting all kinds of blows both with his hands and feet, all of them with great accuracy of aim and omitting nothing which could conduce to victory, and yet after a time fainting and desponding, and at last quitting the arena without the crown of victory; and the other who has received all his blows, being thoroughly hardened with great firmness of flesh, and being tough and unyielding, and filled with the true spirit of an athlete, and invigorated throughout his whole body, being like so much iron or stone, not at all yielding to the blows inflicted by the other, at last, by the endurance and resolution of his spirit, defeating the power of his adversary so as to obtain a complete victory.