Philopoemen (13.2-13.3)

Philopoemen, however, was waging war in Crete all that while, and serving as general across the sea, and so afforded his enemies a chance to accuse him of running away from the war at home. But there were some who said that since the Achaeans chose other men as their generals and Philopoemen was without public office, he merely put the leisure which belonged to him at the service of the Gortynians when they asked him to be their leader.

For he was averse to inactivity, and wished to keep his skill as a commander in war, like any other possession, all the while in use and exercise. And he made this evident by what he once said about King Ptolemy. When certain persons were extolling that monarch because he carefully drilled his army day by day, and carefully and laboriously exercised himself in arms, And yet who, said Philopoemen, can admire a king of his years for always practising but never performing anything?