Master Dogen presents the nuts & bolts ‘how to’ of Zazen …

Shoen o hôsha shi, banji o kyûsoku shite,
zen’aku o omawazu, zehi o kansuru koto nakare.
Shin i shiki no unten o yame, nensôkan no shikiryô o yamete,
sabutsu o hakaru koto nakare, ani zaga ni kakawaran ya.

Abandon all involvements. Give the myriad things a rest. Do not think of good and bad. Do not care about right and wrong. Stop the driving movement of mind, will, consciousness. Cease intellectual consideration through images, thoughts, and reflections. Do not aim to become a buddha. How could it be connected with sitting or lying down? [Nishijima]

Put aside all involvements and suspend all affairs. Do not think “good” or “bad.” Do not judge true or false. Give up the operations of mind, intellect, and consciousness; stop measuring with thoughts, ideas, and views. Have no designs on becoming a Buddha. How could that be limited to sitting or lying down? [SZTP]