I have heard that on one occasion the Blessed One was staying in the Kuru country. Now there is a town of the Kurus called Kammasadhamma. There the Blessed One addressed the monks, "Monks." "Lord," the monks replied. The Blessed One said this: "This is the direct path for the purification of beings, for the overcoming of sorrow & lamentation, for the disappearance of pain & distress, for the attainment of the right method, & for the realization of Unbinding — in other words, the four frames of reference. Which four? "There is the case where a monk remains focused on the body in & of itself — ardent, alert, & mindful — putting aside greed & distress with reference to the world. He remains focused on feelings... mind... mental qualities in & of themselves — ardent, alert, & mindful — putting aside greed & distress with reference to the world. A. Body "And how does a monk remain focused on the body in & of itself? [1] "There is the case where a monk — having gone to the wilderness, to the shade of a tree, or to an empty building — sits down folding his legs crosswise, holding his body erect and setting mindfulness to the fore [lit: the front of the chest]. Always mindful, he breathes in; mindful he breathes out. "Breathing in long, he discerns, 'I am breathing in long'; or breathing out long, he discerns, 'I am breathing out long.' Or breathing in short, he discerns, 'I am breathing in short'; or breathing out short, he discerns, 'I am breathing out short.' He trains himself, 'I will breathe in sensitive to the entire body.' He trains himself, 'I will breathe out sensitive to the entire body.' He trains himself, 'I will breathe in calming bodily fabrication.' He trains himself, 'I will breathe out calming bodily fabrication.' Just as a skilled turner or his apprentice, when making a long turn, discerns, 'I am making a long turn,' or when making a short turn discerns, 'I am making a short turn'; in the same way the monk, when breathing in long, discerns, 'I am breathing in long'; or breathing out long, he discerns, 'I am breathing out long' ... He trains himself, 'I will breathe in calming bodily fabrication.' He trains himself, 'I will breathe out calming bodily fabrication.' "In this way he remains focused internally on the body in & of itself, or externally on the body in & of itself, or both internally & externally on the body in & of itself. Or he remains focused on the phenomenon of origination with regard to the body, on the phenomenon of passing away with regard to the body, or on the phenomenon of origination & passing away with regard to the body. Or his mindfulness that 'There is a body' is maintained to the extent of knowledge & remembrance. And he remains independent, unsustained by (not clinging to) anything in the world. This is how a monk remains focused on the body in & of itself. [2] "Furthermore, when walking, the monk discerns, 'I am walking.' When standing, he discerns, 'I am standing.' When sitting, he discerns, 'I am sitting.' When lying down, he discerns, 'I am lying down.' Or however his body is disposed, that is how he discerns it. "In this way he remains focused internally on the body in & of itself, or focused externally... unsustained by anything in the world. This is how a monk remains focused on the body in & of itself. [3] "Furthermore, when going forward & returning, he makes himself fully alert; when looking toward & looking away... when bending & extending his limbs... when carrying his outer cloak, his upper robe & his bowl... when eating, drinking, chewing, & savoring... when urinating & defecating... when walking, standing, sitting, falling asleep, waking up, talking, & remaining silent, he makes himself fully alert. "In this way he remains focused internally on the body in & of itself, or focused externally... unsustained by anything in the world. This is how a monk remains focused on the body in & of itself. [4] "Furthermore...just as if a sack with openings at both ends were full of various kinds of grain — wheat, rice, mung beans, kidney beans, sesame seeds, husked rice — and a man with good eyesight, pouring it out, were to reflect, 'This is wheat. This is rice. These are mung beans. These are kidney beans. These are sesame seeds. This is husked rice,' in the same way, monks, a monk reflects on this very body from the soles of the feet on up, from the crown of the head on down, surrounded by skin and full of various kinds of unclean things: 'In this body there are head hairs, body hairs, nails, teeth, skin, flesh, tendons, bones, bone marrow, kidneys, heart, liver, pleura, spleen, lungs, large intestines, small intestines, gorge, feces, bile, phlegm, pus, blood, sweat, fat, tears, skin-oil, saliva, mucus, fluid in the joints, urine.' "In this way he remains focused internally on the body in & of itself, or focused externally... unsustained by anything in the world. This is how a monk remains focused on the body in & of itself. [5] "Furthermore...just as a skilled butcher or his apprentice, having killed a cow, would sit at a crossroads cutting it up into pieces, the monk contemplates this very body — however it stands, however it is disposed — in terms of properties: 'In this body there is the earth property, the liquid property, the fire property, & the wind property.' "In this way he remains focused internally on the body in & of itself, or focused externally... unsustained by anything in the world. This is how a monk remains focused on the body in & of itself. [6] "Furthermore, as if he were to see a corpse cast away in a charnel ground — one day, two days, three days dead — bloated, livid, & festering, he applies it to this very body, 'This body, too: Such is its nature, such is its future, such its unavoidable fate'... "Or again, as if he were to see a corpse cast away in a charnel ground, picked at by crows, vultures, & hawks, by dogs, hyenas, & various other creatures... a skeleton smeared with flesh & blood, connected with tendons... a fleshless skeleton smeared with blood, connected with tendons... a skeleton without flesh or blood, connected with tendons... bones detached from their tendons, scattered in all directions — here a hand bone, there a foot bone, here a shin bone, there a thigh bone, here a hip bone, there a back bone, here a rib, there a breast bone, here a shoulder bone, there a neck bone, here a jaw bone, there a tooth, here a skull... the bones whitened, somewhat like the color of shells... piled up, more than a year old... decomposed into a powder: He applies it to this very body, 'This body, too: Such is its nature, such is its future, such its unavoidable fate.' "In this way he remains focused internally on the body in & of itself, or externally on the body in & of itself, or both internally & externally on the body in & of itself. Or he remains focused on the phenomenon of origination with regard to the body, on the phenomenon of passing away with regard to the body, or on the phenomenon of origination & passing away with regard to the body. Or his mindfulness that 'There is a body' is maintained to the extent of knowledge & remembrance. And he remains independent, unsustained by (not clinging to) anything in the world. This is how a monk remains focused on the body in & of itself. B. Feelings "And how does a monk remain focused on feelings in & of themselves? There is the case where a monk, when feeling a painful feeling, discerns, 'I am feeling a painful feeling.' When feeling a pleasant feeling, he discerns, 'I am feeling a pleasant feeling.' When feeling a neither-painful-nor-pleasant feeling, he discerns, 'I am feeling a neither-painful-nor-pleasant feeling.' "When feeling a painful feeling of the flesh, he discerns, 'I am feeling a painful feeling of the flesh.' When feeling a painful feeling not of the flesh, he discerns, 'I am feeling a painful feeling not of the flesh.' When feeling a pleasant feeling of the flesh, he discerns, 'I am feeling a pleasant feeling of the flesh.' When feeling a pleasant feeling not of the flesh, he discerns, 'I am feeling a pleasant feeling not of the flesh.' When feeling a neither-painful-nor-pleasant feeling of the flesh, he discerns, 'I am feeling a neither-painful-nor-pleasant feeling of the flesh.' When feeling a neither-painful-nor-pleasant feeling not of the flesh, he discerns, 'I am feeling a neither-painful-nor-pleasant feeling not of the flesh.' "In this way he remains focused internally on feelings in & of themselves, or externally on feelings in & of themselves, or both internally & externally on feelings in & of themselves. Or he remains focused on the phenomenon of origination with regard to feelings, on the phenomenon of passing away with regard to feelings, or on the phenomenon of origination & passing away with regard to feelings. Or his mindfulness that 'There are feelings' is maintained to the extent of knowledge & remembrance. And he remains independent, unsustained by (not clinging to) anything in the world. This is how a monk remains focused on feelings in & of themselves.