Furthermore, a mendicant examines their own body, up from the soles of the feet and down from the tips of the hairs, wrapped in skin and full of many kinds of filth. ‘In this body there is head hair, body hair, nails, teeth, skin, flesh, sinews, bones, bone marrow, kidneys, heart, liver, diaphragm, spleen, lungs, intestines, mesentery, undigested food, feces, bile, phlegm, pus, blood, sweat, fat, tears, grease, saliva, snot, synovial fluid, urine.’
It’s as if there were a bag with openings at both ends, filled with various kinds of grains, such as fine rice, wheat, mung beans, peas, sesame, and ordinary rice. And someone with good eyesight were to open it and examine the contents: ‘These grains are fine rice, these are wheat, these are mung beans, these are peas, these are sesame, and these are ordinary rice.’ In the same way, a mendicant examines their own body, up from the soles of the feet and down from the tips of the hairs, wrapped in skin and full of many kinds of filth. … As they meditate like this—diligent, keen, and resolute—memories and thoughts of the lay life are given up. Their mind becomes stilled internally; it settles, unifies, and becomes immersed in samādhi. That too is how a mendicant develops mindfulness of the body.
I think the bhikkhu does not use his eyes to observe, but uses some special power. Does anyone have any ideas on this to share?
So body is like “a bag with openings at both ends”, but as far as I know, the only openings at feet and hair are pores. Does it mean that the bhikkhu look through these pores to see internal organs?