Considerable textual, philosophical, and phenomenological justification of this practice can be found throughout Dōgen's Shōbōgenzō, as for example in the "Principles of Zazen" and the "Universally Recommended Instructions for Zazen".
Pembenaran secara tekstual, filosofis, dan fenomenologis yang cukup besar untuk praktik ini dapat ditemukan di seluruh Dogen Shōbōgenzō, seperti misalnya dalam buku "Principles of Zazen" dan "Universally Recommended Instructions for Zazen”.