The Book of Ferro

9:20
Water discipline: Only spit poison.

9:22
Desertcraft: All places outside your or your extended family’s sealed and checked sietch are desert, and so when you shall not relax.

9:23
Water discipline: Breathing: This is proper, but not iron; train faithfully and your flesh will come to switch with easy effort; cultivate not fleshly ignorance, here:

(1) In the desert, in through the mouth and out through the nose;

(2) in your or your extended family’s sealed and checked sietch, in through the nose and out through the mouth;

(3) during mental exertion, in through the nose, out through the nose;

(4) during bodily exertion, in through the mouth, out through the mouth;

(5) during sex, in through the nose and mouth, out through the nose and mouth;

(6) in a toxic environment, nothing, to the limits of one’s ability to resist oxygen addiction and in proportion to the appraised harmfulness of the air.

9:36
Water discipline: One cannot shame a Fremen by sullying his uniform or face, or by putting anything whatever into him. A Fremen gladly smiles at the sight and feel of an enemy shaming himself, the Fremen knowing his own righteousness.