At the very moment of sitting, what is sitting? Is it an acrobat’s graceful somersault or the rapid darting of a fish? Is it thinking or not thinking? Is it doing or not doing? Is it sitting within sitting? Is it sitting within body-mind? Is it sitting letting go of sitting within sitting, or letting go of sitting within body-mind? Investigate this in every possible way. Sit in the body’s meditation posture. Sit in the mind’s meditation posture. Sit in the meditation posture of letting go of body-mind.

Dogen (1200-1253), Dōgen Zenji , was a Japanese Buddhist priest, writer, poet, philosopher, and founder of the Sōtō school of Zen in Japan.