摩訶止觀 8.110

8.110

若赤痢、白痢、卒中惡、面青、眼反、脣黑，不別人者，以手痛捻丹田，須臾即差。又隨身上有痛處，手杖痛打病處，至四、五十。此復何意？夫諸病無非心作，心有憂愁思慮，邪氣得入。今以痛偪之，則不暇橫想，邪氣去，病除也。

If there is red dysentery, white dysentery, sudden affliction by evil, a pale blue face, upturned eyes, blackened lips, and failure to recognize people, firmly pinch the cinnabar field with the hands, and in a moment it will be cured. Furthermore, wherever there is pain on the body, strike the painful affected area forcefully with a staff forty or fifty times. What is the meaning of this? All illnesses are nothing other than creations of the mind; when the mind has grief, worry, and anxious thoughts, perverse qi is able to enter. Now, pressing it with pain leaves no leisure for erratic thoughts; the perverse qi departs, and the illness is removed.