The Buddha once said that among his teachings on various topics, many do not reveal the complete meaning because they are directed at educating people of certain mental dispositions. However, there is one teaching which is definitive and invariable, a core concept repeated time and time again by the buddhas not only of the present but also the past and future– that of emptiness. Emptiness is ultimate truth. It is the essence of Buddhist doctrine, the underlying substance of the teachings of Buddha Sakyamuni as well as the buddhas and bodhisattvas of the ten directions and three times.

- Quote from The Four Seals of Dhama, "All Phenomena Lack Self-Existence"