He emphasized that Buddhahood is not something that is completed once one has attained a certain level; rather, continuing to seek further Buddhahood through endless training, even after one has become a Buddha, is the essence of Buddhahood (Shusho Ichinyo); and the highest form of training is to be like the Sakyamuni and simply do sitting meditation (Shikan Taza).
成仏とは一定のレベルに達することで完成するものではなく、たとえ成仏したとしても、さらなる成仏を求めて無限の修行を続けることこそが成仏の本質であり（修証一如）、釈迦に倣い、ただ坐禅にうちこむことが最高の修行である（只管打坐）と主張した。