2 practices

A breath-awareness practice Dogen described in a formal lecture: knowing a long breath as long and a short breath as short, felt arriving at and leaving from the tanden — the 'field of cinnabar' in the lower abdomen — without controlling or counting it.

Dogen's core zazen instruction: a precisely specified seated posture paired with the practice of 'non-thinking' — not suppressing thought, but resting in the awareness that notices a thought the instant it arises, so it passes on its own.