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Summary:

Hengchuan said, "The whole body is food, the whole body is drink. How many drink themselves to death? How many eat themselves to death?"

"The method of dwelling in peace has already been explained: we just have to practice it faithfully. As we raise and lower our feet, we naturally do not harm living beings. To protect life requires killing the false self; only when this is completely slain can one live in peace. This method too must be practiced faithfully."

Link:

https://www.reddit.com/r/zen/comments/wjv07g/zen_under_the_gun_gluttony_false_selves_its_a/

Book in question:

https://www.amazon.com/Zen-Under-Gun-Masters-Turbulent/dp/0861715926/