Dhp 90-92 · The Venerable (Arhat)
There is no suffering for him who has finished his journey, and abandoned grief, who has freed himself on all sides, and thrown off all fetters. They depart with their thoughts well-collected, they are not happy in their abode; like swans who have left their lake, they leave their house and home. Men who have no riches, who live on recognised food, who have perceived void and unconditioned freedom (Nirvana), their path is difficult to understand, like that of birds in the air.