Об уходе в нирвану из 4-й дхъяны

"And what, monks, is right concentration? (i) There is the case where a monk — quite withdrawn from sensuality, withdrawn from unskillful (mental) qualities — enters & remains in the first jhana: rapture & pleasure born from withdrawal, accompanied by directed thought & evaluation. (ii) With the stilling of directed thoughts & evaluations, he enters & remains in the second jhana: rapture & pleasure born of concentration, unification of awareness free from directed thought & evaluation — internal assurance. (iii) With the fading of rapture, he remains equanimous, mindful, & alert, and senses pleasure with the body. He enters & remains in the third jhana, of which the Noble Ones declare, 'Equanimous & mindful, he has a pleasant abiding.' (iv) With the abandoning of pleasure & pain — as with the earlier disappearance of elation & distress — he enters & remains in the fourth jhana: purity of equanimity & mindfulness, neither pleasure nor pain. This, monks, is called right concentration."

Конечно все понятия находятся внутри ума. Но разве все причины для них только в уме?

Есть такой пример: во сне мы можем контролировать других через своё воображение. В бодрствующем состоянии мы не можем...

Так это про samadhi. Тогда вопрос: есть ли разница между samadhi и samma-samadhi? С акцентом на samma.

Я вообще сомневаюсь что можно жить следуя солипсизму, идеализму, и тотальному скептицизму (ничего знать нельзя).
Мы живём и действуем как будто есть другие люди и события происходят без нас.

Не совсем понятно из данной цитаты: samma-sammadhi - это все же 4-я дхьяна (и соответственно фактическое освоение предыдущих трех, потому что по иному к 4-й не подойти) или любая из 4-х?

Кстати, в Samadhi sutta http://www.accesstoinsight.org/tipitaka/an/an04/an04.041.than.html AN 4.41 PTS: A ii 44 дхьяны 5, 6, 7, 8 не фигурируют вовсе.

У меня сложилось впечатление, что достаточно любой из них.
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"'I tell you, the ending of the mental fermentations depends on the first jhana.' Thus it has been said. In reference to what was it said? There is the case where a monk, secluded from sensuality, secluded from unskillful qualities, enters & remains in the first jhana: rapture & pleasure born of seclusion, accompanied by directed thought & evaluation. He regards whatever phenomena there that are connected with form, feeling, perception, fabrications, & consciousness, as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a disintegration, an emptiness, not-self. He turns his mind away from those phenomena, and having done so, inclines his mind to the property of deathlessness: 'This is peace, this is exquisite — the resolution of all fabrications; the relinquishment of all acquisitions; the ending of craving; dispassion; cessation; Unbinding.' AN9.36

Я пока так понял, что любое самадхи, связанное с джханами - это самма самадхи. Но кроме него есть еще "благородное правильное самадхи" - это когда собраны вместе 7 остальных факторов Пути.

The Blessed One said: "Now what, monks, is noble right concentration with its supports & requisite conditions? Any singleness of mind equipped with these seven factors — right view, right resolve, right speech, right action, right livelihood, right effort, & right mindfulness — is called noble right concentration with its supports & requisite conditions.

... no brahmans or contemplatives who, faring rightly & practicing rightly, proclaim this world & the next after having directly known & realized it for themselves.' This is wrong view.