emptinessŚūnyatā, the Buddhist teaching of the emptiness of things.Read more: https://en.wikipedia.org/wiki/%C5%9A%C5%ABnyat%C4%81
empty heartA Daoist term that describes a state of mind that is absolutely clear; a pure, empty heart is the prerequisite for perceiving the Dao and for (non-)acting (wu wei) in accordance with it.