금강반야바라밀경
The emphasis which Shenhui placed on sudden enlightenment, also reflected a growing appreciation of the Diamond Sutra in 8th-century Chinese Buddhism. The Lankavatara-sutra, which endorses the Buddha-nature, emphasized purity of mind, which can be attained in gradations. The Diamond-sutra emphasizes sunyata, which "must be realized totally or not at all".