Four Virtues of Nirvāṇa

The four virtues of nirvāṇa—permanence, bliss, self, and purity—are a realm, a state, a nature. Permanence, bliss, self, and purity are the self-abiding realm of the great mirror-like wisdom (ādarśa-jñāna) at the buddha-stage; they manifest in dependence upon the great mirror-like wisdom, and they are also not real—only the great mirror-like wisdom is the real entity, the real characteristic, the real dharma. The nirvāṇa at the buddha-stage manifests in dependence upon the great mirror-like wisdom, and it is likewise not a real entity, not a real characteristic, not a real dharma. Apart from the Ālayavijñāna, apart from the vipāka-consciousness, apart from the undefiled consciousness (amala-vijñāna), all other dharmas are entirely displayed and manifested by the tathāgatagarbha; they exist in dependence upon the tathāgatagarbha and are never apart from it. Only the tathāgatagarbha depends on no dharma whatsoever, existing independently, relying on nothing, standing proudly on its own.