Unlike the meditation works of Zhiyi, the 'Principles' doesn't outline a vipassana practice which leads to wisdom - prajña. This might be because the ideas of Zongze seem to be related practices in the Chan chronicle Lengqie Shizi ji and to the teachings of the East Mountain Teaching, who taught that in quieting the mind one would be able to see one's innate Buddha nature and that this was a form of sudden enlightenment.King, Sallie B; Buddha Nature, page 158. This teaching is also related to the concept of tathātā "Suchness" which is derived from the Awakening of Faith in the Mahayana. Tsung-tse uses a well known metaphor to describe how practicing his kind of samadhi will lead the discovery of inherent wisdom already present in the mind:
