"The ancient republics of Greece, with that wisdom which was so conspicuous in most of their institutions, forbade their citizens to pursue all those inactive and sedentary occupations, which by enervating and corrupting the body diminish also the vigour of the mind. With what courage, in fact, can it be thought that hunger and thirst, fatigues, dangers and death, can be faced by men whom the smallest want overwhelms and the slightest difficulty repels?"