And how is mindfulness of breathing developed and cultivated so as to fulfill the four kinds of mindfulness meditation? It’s when a mendicant—gone to a wilderness, or to the root of a tree, or to an empty hut—sits down cross-legged, sets their body straight, and brings mindfulness to the present. Just mindful, they breathe in. Mindful, they breathe out. Breathing in heavily they know: ‘I’m breathing in heavily.’ Breathing out heavily they know: ‘I’m breathing out heavily.’ … They practice like this: ‘I’ll breathe in observing letting go.’ They practice like this: ‘I’ll breathe out observing letting go.’

There’s a time when a mendicant is breathing in heavily, and they know: ‘I’m breathing in heavily.’ Breathing out heavily they know: ‘I’m breathing out heavily.’ … They practice like this: ‘I’ll breathe in stilling the physical process.’ They practice like this: ‘I’ll breathe out stilling the physical process.’ At such a time a mendicant is meditating by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world. Why is that? Because the breath is a certain aspect of the body, I say. Therefore, at such a time a mendicant is meditating by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world.