大毘盧遮那成佛經疏 9.18

9.18

梵本初句但云形像，然與無相法文勢相連，意明法無形像也。性本淨，猶如明鏡澄然清淨，無有穢濁而能普現眾像。當知此像不從鏡中生、不從外質生、不共生亦非無因緣有，種種戲論皆不相應，亦復不可執取，但屬眾因緣耳。緣合不生、緣離不滅，即言無常無斷、無去無來，當知即像是鏡、即鏡是像。若能如是解時，即見諸法實相，知心自性本無染污也。以此如鏡之心、鑒如心之鏡，故說心自見心、心自知心，智之與鏡無二無別。所以決去眼膜，正為觀如此法界，故自明之。若與此相應時，即於普門漫荼羅得除蓋障三昧，能為一切眾生作無比利，或云無對、或云無稱，謂不可稱量也。以能自生心佛家故，是名佛心之子。從心佛生故，曰汝從佛心生。

The first line of the Sanskrit text merely says 'shape and form', yet its phrasing is continuous with the unconditioned Dharma, intending to clarify that phenomena are devoid of shape and form. Their nature is originally pure, like a clear mirror serene and pellucid, without defilement or turbidity, yet capable of universally reflecting all images. You should know that these images are not born from within the mirror, not born from external substances, not born from both together, nor do they exist without causes and conditions; various prapañca are all inapplicable to them, nor can they be grasped, but merely belong to causes and conditions. When conditions converge they are not born; when conditions disperse they do not perish; that is to say, they are neither impermanent nor annihilated, neither coming nor going. You should know that the image is the mirror, and the mirror is the image. If one can understand in this way, one sees the dharmatā of all phenomena and knows that the self-nature of the mind is originally undefiled. Using this mirror-like mind to reflect upon the mind-like mirror, it is said that the mind itself sees the mind and the mind itself knows the mind; wisdom and the mirror are not two and not distinct. The reason the cataract film of the eye was removed was precisely to contemplate this dharmadhātu; hence it explains itself. If one accords with this, one attains the Sarvanīvaraṇaviṣkambhin samādhi in the universal gateway maṇḍala, and is able to produce matchless benefit for all sentient beings—also called 'unrivaled' or 'incomparable', meaning immeasurable. Because one is capable of giving birth to oneself in the family of the mind-Buddha, one is called a child of the Buddha's heart. Because one is born from the mind-Buddha, it says 'you are born from the Buddha's heart'.