“We need to occasionally relax the mind, and the body requires some recreation also. Cassian relates how St. John the Evangelist was found by a certain hunter amusing himself by petting a partridge, which sat upon his wrist. The hunter asked how a man of his mental powers could find time for so trifling an occupation. In reply, St. John asked why he did not always carry his bow strung? The man answered, Because, if always bent, the bow would lose its spring when really wanted. ‘Do not marvel then,’ the Apostle replied, ‘if I slacken my mental efforts from time to time, and recreate myself, in order to return more vigorously to contemplation.'”
Source: St. Francis de Sales, Introduction to the Devout Life, Random House, Inc., 2002.