[156] For even if all the other faculties of the rest of the body, should attain to the very extreme limit of strength and vigour, still, if they are tripped up, as it were, and deprived of their foundation by the deprivation of the eyes and ears, they will meet with a great fall, so as never again to be able to rise; for the things which support man and keep him erect are in name, indeed, the feet, but in reality the powers of hearing and seeing; and the man who possesses them in their complete integrity is awake and stands upright, but he who is deprived of them falls and will be utterly destroyed.