(The Four Frames of Reference)

"[1] Now, on whatever occasion a monk breathing in long discerns that he is breathing in long; or breathing out long, discerns that he is breathing out long; or breathing in short, discerns that he is breathing in short; or breathing out short, discerns that he is breathing out short; trains himself to breathe in... &... out sensitive to the entire body; trains himself to breathe in... &... out calming the bodily processes: On that occasion the monk remains focused on the body in & of itself -- ardent, alert, & mindful -- subduing greed & distress with reference to the world. I tell you, monks, that this -- the in-&-out breath -- is classed as a body among bodies, which is why the monk on that occasion remains focused on the body in & of itself -- ardent, alert, & mindful -- putting aside greed & distress with reference to the world.

"[2] On whatever occasion a monk trains himself to breathe in... &... out sensitive to rapture; trains himself to breathe in... &... out sensitive to pleasure; trains himself to breathe in... &... out sensitive to mental processes; trains himself to breathe in... &... out calming mental processes: On that occasion the monk remains focused on feelings in & of themselves -- ardent, alert, & mindful -- subduing greed & distress with reference to the world. I tell you, monks, that this -- close attention to in-&-out breaths -- is classed as a feeling among feelings, which is why the monk on that occasion remains focused on feelings in & of themselves -- ardent, alert, & mindful -- putting aside greed & distress with reference to the world.

"[3] On whatever occasion a monk trains himself to breathe in... &... out sensitive to the mind; trains himself to breathe in... &... out satisfying the mind; trains himself to breathe in... &... out steadying the mind; trains himself to breathe in... &... out releasing the mind: On that occasion the monk remains focused on the mind in & of itself -- ardent, alert, & mindful -- subduing greed & distress with reference to the world. I don't say that there is mindfulness of in-&-out breathing in one of confused mindfulness and no alertness, which is why the monk on that occasion remains focused on the mind in & of itself -- ardent, alert, & mindful -- putting aside greed & distress with reference to the world.

"[4] On whatever occasion a monk trains himself to breathe in... &... out focusing on inconstancy; trains himself to breathe in... &... out focusing on dispassion; trains himself to breathe in... &... out focusing on cessation; trains himself to breathe in... &... out focusing on relinquishment: On that occasion the monk remains focused on mental qualities in & of themselves -- ardent, alert, & mindful -- subduing greed & distress with reference to the world. He who sees clearly with discernment the abandoning of greed & distress is one who oversees with equanimity, which is why the monk on that occasion remains focused on mental qualities in & of themselves -- ardent, alert, & mindful -- putting aside greed & distress with reference to the world.

"This is how mindfulness of in-&-out breathing is developed & pursued so as to bring the four frames of reference to their culmination.