If a man insisted always on being serious, and never allowed himself a bit of fun and relaxation, he would go mad or become unstable without knowing it.
HerodotusBowmen bend their bows when they wish to shoot: unbrace them when the shooting is over. Were they kept always strung they would break and fail the archer in time of need. So it is with men. If they give themselves constantly to serious work, and never indulge awhile in pastime or sport, they lose their senses and become mad.
HerodotusAnd now for the vapor-bath: on a framework of three sticks, meeting at the top, they stretch pieces of woolen cloth, taking care to get the joints as perfect as they can, and inside this little tent they put a dish with red-hot stones in it. Then they take some hemp seed, creep into the tent, and throw the seed on to the hot stones. At once it begins to smoke, giving off a vapor unsurpassed by any vapor-bath one could find in Greece. The Sythians enjoy it so much that they howl with pleasure. This is their substitute for an ordinary bath in water, which they never use.
Herodotus