Health is the greatest possession. Contentment is the greatest treasure. Confidence is the greatest friend. Non-being is the greatest joy.
- Dhammapada, The

Clay is molded to form a cup, But it is on its non-being that the utility of the cup depends. Doors and windows are cut out to make a room, But it is on its non-being that the utility of the room depends. Therefore turn being into advantage, and turn non-being into utility.
- Lao-Tzu