維摩經玄疏 6.29

6.29

Second, clarifying the true mark of dharma-nature as the substance of Mahāyāna sūtras in terms of unshared prajñā under the perfect teaching: all phenomena are precisely buddha-nature, nirvāṇa, and tathāgatagarbha; thus the two vehicles in the assembly were as if deaf and mute. It is like a wish-fulfilling jewel, not a crystal bead; how could one speak of similarity!