Shinjin Gakudō
Introduction
Shinjin Gakudō (身心學道, "Studying the Way with body and mind") is one of the richest and least accessible chapters of the Shōbōgenzō. Dōgen explores Buddhist practice as a simultaneous and inseparable engagement of body and mind, refusing any division between the two.
Body and mind are not two paths to awakening — they are one and the same reality in the study of the Way. The chapter's most striking formulation: walls and rubble (shōheki garetsu) are the mind of the ancient buddhas. And conversely, the ordinary mind (byōjō shin) is continuous presence, with no separation between "this world" and "the other world."
The chapter concludes with a cosmic vision of the true human body: birth-and-death is the true body of the real person; the entire universe of the ten directions is this body.
The necessity of practice
The Way of the Buddha: wishing to do without it is impossible. To seek to distance oneself from it through non-learning is to distance oneself further still. The great Chan master Nanyue Dahui said: "It is not true that practice and awakening are absent — simply, they cannot be defiled." If one does not study the Way of the Buddha, one immediately falls into the way of non-Buddhists or of the icchantika. This is why all buddhas, past and future, necessarily practice the Way of the Buddha.
The two modes of study
Studying the Way of the Buddha — there are provisionally two aspects. Namely: studying with the mind, and studying with the body. Studying with the mind means studying with all possible minds, in their totality.
Walls and rubble — the mind of the ancient buddhas
What is called "the mind of the ancient buddhas": there was a time when a monk asked the national master Dazheng: "What then is the mind of the ancient buddhas?" The national master replied: "Walls and rubble (shōheki garetsu)."
One must know this: the mind of the ancient buddhas is not walls and rubble — and yet it is not the case either that walls and rubble are called the mind of the ancient buddhas. It is in this way that the mind of the ancient buddhas must be studied.
The ordinary mind
What is called "the ordinary mind" (byōjō shin): without distinguishing this world from the other world, it is the ordinary mind as it is. Yesterday, one departed from here. Today, one has arrived from here.
Studying the Way with the body
Studying the Way with the body (shin gakudō) means studying the Way through the body. It is the study of the Way by the mass of living red flesh. The body comes from the study of the Way — and what comes from the study of the Way is, itself, entirely body.
The entire expanse of the ten directions: this is the true body of the real person (shinno jintai, 眞實人體). Birth, death, going, coming — this is the true body of the real person.
Birth-and-death is the true body
To say that birth, death, going, coming are the true body of the real person: certainly, birth-and-death is the flux-and-return of the ordinary being — but it is also that from which the great sage has liberated himself.
Birth resembles the juniper tree (hakujushi). Death resembles the iron man. This birth-and-death, and the view one has of it — where then would we wish to place them?
Full function — according to Yuanwu
The Chan master Yuanwu said:
Birth? Full function manifests.
Death? Full function manifests.
It fills and presses against the great void.
The naked heart — always in luminous fragments.
(Zenki gen, 全機現: the integral unfolding of all reality, without withholding. The "naked heart always in luminous fragments" (shakushin tsune ni henhen): not broken, but irreducibly particular, alive, present at every moment.)
Translated from classical Japanese based on the text provided by CBETA (Shinshū Taishōzō Taikei Database), University of Tokyo.
Original text in classical Japanese (文語). Shinjin Gakudō, chapter 09. Eihei Dōgen Zenji (1200–1253). Translation: DeepSeek V3.2 via Amazon Bedrock.
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