Irish joke from the 10th century

Three penitents resolved to quit the world for the ascetic life, and so sought the wilderness. 
After exactly a year's silence the first said, "'Tis a good life we lead." 
At the next year's end the second answered, "It is so." 
Another year being run out, the third exclaimed,
 "If I cannot have peace and quiet here I'll go back to the world!"