宗鏡錄 2.18

2.18

Question: The three realms are defiled phenomena (sāsrava-dharma); because they are bound by the bond of craving (tṛṣṇā-saṃyojana) pertaining to the three realms, they are called the "three realms". Unconditioned (asaṃskṛta) and undefiled (anāsrava) phenomena are not bound by the bond of craving of the three realms, and therefore are not called phenomena of the three realms. Why, then, do the sūtras merely state that "the three realms are only citta", thereby not including unconditioned and undefiled phenomena? Are these not also consciousness-only (vijñaptimātra), such that [the scriptures] speak only of the three realms?