Letter 104 — On Care of Health and Peace of Mind (§33)

“You see that man can endure toil: Cato, on foot, led an army through African deserts. You see that thirst can be endured: he marched over sun-baked hills, dragging the remains of a beaten army and with no train of supplies, undergoing lack of water and wearing a heavy suit of armour; always the last to drink of the few springs which they chanced to find.”