"Bhikkhus, that bhikkhu gains at will, without trouble or difficulty, that concentration through the development and cultivation of which no shaking or trembling occurs in the body, and no shaking or trembling occurs in the mind. And what concentration is it through the development and cultivation of which no shaking or trembling occurs in the body, and no shaking or trembling occurs in the mind?
"It is, bhikkhus, when concentration by mindfulness of breathing has been developed and cultivated that no shaking or trembling occurs in the body, and no shaking or trembling occurs in the mind. And how, bhikkhus, is concentration by mindfulness of breathing developed and cultivated so that no shaking or trembling occurs in the body, and no shaking or trembling occurs in the mind?
"Here, bhikkhus, a bhikkhu, having gone to the forest, to the foot of a tree, or to an empty hut, sits down.
Having folded his legs crosswise, straightened his body and set up mindfulness in front of him, just mindful ha breathes in, mindful he breathes out.
"Breathing in long, he knows: "I breathe in long. or breathing out long, he knows: 'I breathe out long.
Breathing in short, he knows: 'I breath in short: or breathing out short, he knows: 'I breathe out short.
He trains thus: 'Experiencing the whole body, I will breathe in';
He trains thus: 'Experiencing the whole body, I will breathe out.'
He trains thus: 'Tranquilizing the bodily formations, I will breathe in';
He trains thus: 'Tranquilizing the bodily formations, I will breathe out.'
He trains thus: 'Experiencing rapture, I will breathe in';
He trains thus: 'Experiencing rapture, I will breathe out.'
He trains thus: 'Experiencing happiness, I will breathe in';
He trains thus: 'Experiencing happiness, I will breathe out.'
He trains thus: 'Experiencing the mental formation, I will breathe in';
He trains thus: 'Experiencing the mental formation, I will breathe out.'
He trains thus: 'Tranquilizing the mental formation, I will breathe in';
He trains thus: 'Tranquilizing the mental formation, I will breathe out.'
He trains thus: 'Experiencing the mind, I will breathe in';
He trains thus: 'Experiencing the mind, I will breathe out.'
He trains thus: 'Gladdening the mind, I will breathe in';
He trains thus: 'Gladdening the mind, I will breathe out.'
He trains thus: 'Concentrating the mind, I will breathe in';
He trains thus: 'Concentrating the mind, I will breathe out.'
He trains thus: 'Liberating the mind, I will breathe in';
He trains thus: 'Liberating the mind, I will breathe out.'
He trains thus: 'Contemplating impermanence, I will breathe in';
He trains thus; 'Contemplating impermanence, I will breathe out.'
He trains thus; 'Contemplating fading away, I will breathe in';
He trains thus: 'Contemplating fading away, I will breathe out.'
He trains thus: 'Contemplating cessation, I will breathe in';
He trains thus: 'Contemplating cessation, I will breathe out.'
He trains thus: 'Contemplating relinquishment, I will breathe in';
He trains thus: 'Contemplating relinquishment, I will breathe out."
"It is, bhikkhus, when concentration by mindfulness of breathing has been developed and cultivated in this way that no shaking or trembling occurs in the body, and no shaking or trembling occurs in the mind."
"I too, bhikkhus, before my enlightenment, while I was still a bodhisatta, not yet fully enlightened, generally dwelt in this dwelling. While I generally dwelt in this dwelling, neither my body nor my eyes became fatigued and my mind, by not clinging, was liberated from the taints.
"Therefore, bhikkhus, if a bhikkhu wishes: 'May neither my body nor my eyes become fatigued and may my mind, by not clinging, be liberated from the taints, this same concentration by mindfulness of breathing should be closely attended to."
