And how is mindfulness of breathing developed and cultivated so as to fulfill the four kinds of mindfulness meditation?

Whenever a mendicant knows that they breathe heavily, or lightly, or experiencing the whole body, or stilling the physical process—at that time they’re meditating by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world. For I say that the in-breaths and out-breaths are an aspect of the body. That’s why at that time a mendicant is meditating by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world.

Whenever a mendicant practices breathing while experiencing rapture, or experiencing bliss, or experiencing the mental process, or stilling the mental process—at that time they meditate observing an aspect of feelings—keen, aware, and mindful, rid of covetousness and displeasure for the world. For I say that careful application of mind to the in-breaths and out-breaths is an aspect of feelings. That’s why at that time a mendicant is meditating by observing an aspect of feelings—keen, aware, and mindful, rid of covetousness and displeasure for the world.