"Mendicants, an unlearned ordinary person feels pleasant, painful, and neutral feelings. A learned noble disciple also feels pleasant, painful, and neutral feelings. What, then, is the difference between a learned noble disciple and an ordinary unlearned person?"
"When an unlearned ordinary person experiences painful physical feelings they sorrow and wail and lament, beating their breast and falling into confusion. They experience two feelings: physical and mental.
It's like a person who is struck with an arrow, only to be struck with a second arrow. That person experiences the feeling of two arrows.
In the same way, when an unlearned ordinary person experiences painful physical feelings they sorrow and wail and lament, beating their breast and falling into confusion. They experience two feelings: physical and mental.
When a learned noble disciple experiences painful physical feelings they don't sorrow or wail or lament, beating their breast and falling into confusion. They experience one feeling: physical, not mental."