Root of Joy ［喜根比丘］ ( Prasannendriya; Kikon-biku): A monk said to have lived in the latter age after the death of a Buddha named Lion Sound King. He is referred to in the Non-Substantiality of All Phenomena Sutra and The Treatise on the Great Perfection of Wisdom. He did not value ascetic practices, but taught only the doctrine of the true aspect of all phenomena. Because of this, the monk Superior Intent insulted him in front of many other monks. Root of Joy upheld his beliefs and attained Buddhahood, while Superior Intent is said to have fallen into hell.