IN CONSTRUCTION
Right Concentration (Samma Samadhi) is defined in:
the Digha Nikaya #22, called the Mahasatipatthana Sutta
the Majjhima Nikaya #14, called the Saccavibhanga Sutta
"And what is Right Concentration? Here a monk -- secluded from sense desires, secluded from unwholesome states of mind -- enters and remains in the First Jhana which is filled with rapture and joy born of seclusion accompanied by initial and sustained attention.
With the stilling of initial and sustained attention, by gaining inner tranquillity and oneness of mind, he enters and remains in the Second Jhana which is without initial and sustained attention; born of concentration, and is filled with rapture and joy.
With the fading away of rapture, remaining imperturbable, mindful, and clearly aware, he enters and remains in the Third Jhana, and of him the Noble Ones declare, "Equanimous and mindful, he has a pleasurable abiding."
With the the abandoning of pleasure and pain -- as with the earlier disappearance of elation and distress -- he enters and remains in the Fourth Jhana: which is beyond pleasure and pain; and purified by equanimity and mindfulness. This is called Right Concentration.
From the Vishudhi maga (or Visuddhimagga):
(1) "Detached from sensual objects, o monks, detached from unwholesome consciousness, attached with thought-conception (vitakka) and discursive thinking, born of detachment (vivekaja) and filled with rapture and joy (sukha) he enters the first absorption.
(2) "After the subsiding of thought-conception and discursive thinking, and by gaining inner tranquility and oneness of mind, he enters into a state free from thought-conception and discursive thinking, the second absorption, which is born of concentration, and filled with rapture and joy (sukha).
(3) "After the fading away of rapture he dwells in equanimity, mindful, clearly conscious; and he experiences in his person that feeling of which the Noble Ones say, 'Happy lives the man of equanimity and attentive mind'; thus he enters the third absorption.
(4) "After having given uppleasure and pain, and through the disappearance of previous joy and grief, he enters into a state beyond pleasure and pain, into the fourth absorption, which is purified by equanimity and mindfulness.
(5) "Through the total overcoming of the perceptions of matter, however, and through the vanishing of sense-reactions and the non-attention to the perceptions of variety, with the idea, 'Boundless is space', he reaches the sphere of boundless space and abides therein.
(6) "Through the total overcoming of the sphere of boundless space, and with the idea 'Boundless is consciousness', he reaches the sphere of boundless consciousness and abides therein.
(7) "Through the total overcoming of the sphere of boundless consciousness, and with the idea 'Nothing is there', he reaches the sphere of nothingness and abides therein.
(8) "Through the total overcoming of the sphere of nothingness he reaches the sphere of neither-perception-nor- non-perception and abides therein."
(1) "Detached from sensual objects, o monks, detached from unwholesome consciousness, attached with thought-conception (vitakka) and discursive thinking, born of detachment (vivekaja) and filled with rapture and joy (sukha) he enters the first absorption.
(2) "After the subsiding of thought-conception and discursive thinking, and by gaining inner tranquility and oneness of mind, he enters into a state free from thought-conception and discursive thinking, the second absorption, which is born of concentration, and filled with rapture and joy (sukha).
(3) "After the fading away of rapture he dwells in equanimity, mindful, clearly conscious; and he experiences in his person that feeling of which the Noble Ones say, 'Happy lives the man of equanimity and attentive mind'; thus he enters the third absorption.
(4) "After having given up pleasure and pain, and through the disappearance of previous joy and grief, he enters into a state beyond pleasure and pain, into the fourth absorption, which is purified by equanimity and mindfulness."
IN CONSTRUCTION