Śūraṅgama Sūtra: Bodhisattva Maitreya Introduces the Practice of the Contemplation of Mind-Only Consciousness

From the nature of consciousness flow forth immeasurable Tathāgatas. This statement is extremely crucial: every single dharma that flows forth from the tathāgatagarbha is entirely the tathāgatagarbha, entirely the Tathāgata—every dharma is tathatā.

Contemplate attentively that the ten directions are consciousness-only; the conscious mind is perfectly luminous, entering the perfectly accomplished consciousness (pariniṣpanna), departing from the dependent-arising nature (paratantra) and the imputed grasping (parikalpita), and attaining the patience of non-arising (anutpattika-dharma-kṣānti).

Observe carefully that the worlds of the ten directions, down to the finest particle of dust, are all the perfectly accomplished nature of consciousness of the tathāgatagarbha alone, transformed and manifested by the tathāgatagarbha; all are the nature of the tathāgatagarbha—the conscious mind, the tathāgatagarbha, perfectly and wondrously luminous, manifests all dharmas. After contemplating in this way, one can enter into the tathāgatagarbha of one's own mind, accomplishing the transformation of the basis as tathāgatagarbha thoroughly and completely, no longer relying on the sixth consciousness, which is of dependent-arising nature (paratantra), nor on the seventh consciousness (manas), which is of imputed nature (parikalpita), but relying entirely on the true mind and self-nature, relying on the true suchness and buddha-nature. One then proves that all dharmas are the tathāgatagarbha and have never truly been born, and that the self-nature of the tathāgatagarbha is also not born but has always existed from the very beginning; thus the attachment to dharmas is severed.