“Monks, when stillness by mindfulness of breathing is developed and cultivated, it is peaceful and sublime, and a satisfying state of bliss. And it removes bad and unwholesome qualities on the spot, whenever they arise. Just as a great, unseasonal storm in the last month of summer removes the dust and dirt from the air, just so, when stillness by mindfulness of breathing is developed and cultivated, it is peaceful and sublime, and it removes bad and unwholesome qualities on the spot, whenever they arise. And how is stillness by mindfulness of breathing developed and cultivated in this way? A monk sits down in the wilderness, at the foot of a tree, or in an empty hut. He crosses his legs, straightens his body, and sets up mindfulness in front of him. Simply mindful, he breathes in; mindful, he breathes out. When he breathes in long, he knows it; and when he breathes out long, he knows that. When he breathes in short, he knows it; and when he breathes out short, he knows that. When breathing in, he trains in fully experiencing the breath; when breathing out, he trains in fully experiencing the breath. When breathing in, he trains in calming the activity of the body; when breathing out, he trains in calming the activity of the body.