宗鏡錄 94.47

94.47

勝跡菩薩所解諸法經云。法唯一字。所謂無字。本無言說。當知無說。是為真說。釋曰。心為一字中王。攝盡無邊之教海。心為諸佛智母。演出無盡之真詮。若能發明。決定信入。則如來常不說法。是名具足多聞。亦是唯願少聞。多解義趣。即斯旨矣。故涅槃疏云。涅槃之義。浩然無盡。欲舉一蔽諸。指鹹談海者。即一心也。

The Shengji pusa suojie zhufa jing says: 'The Dharma is only a single word, namely the word "non-existence". Originally there is no speech; one should know that non-speech is true speech.'

Explanation: The mind is the king among single words, encompassing the entire boundless ocean of teachings. The mind is the mother of the wisdom of all buddhas, expressing the inexhaustible true teachings. If one can clarify this and enter with decisive faith, then the Tathāgata constantly does not expound the Dharma, which is called being complete in broad learning; it is also 'wishing only to hear little, but understanding much of the principle and purport'—this is precisely the purport. Hence the commentary on the Nirvāṇa-sūtra says: 'The meaning of nirvāṇa is vast and inexhaustible. If one wishes to present one to encompass all, to point to salt to speak of the ocean, it is none other than the one mind.'