Those who are skilled in archery bend their bow only when they are preparing to use it; when they do not require it, they allow it to remain unbent, for otherwise it would remain unserviceable when the time for using it arrived. So it is with man. If he were to devote himself unceasingly to a dull round of business, without breaking the monotony by cheerful amusements, he would fall imperceptibly into idiocy, or be struck by paralysis
HerodotusThe period of a [Persian] boy's education is between the ages of five and twenty, and he is taught three things only: to ride, to use the bow, and to speak the truth.
HerodotusHe is the best man who, when making his plans, fears and reflects on everything that can happen to him, but in the moment of action is bold.
Herodotus