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“Bhikkhus, just as the river Ganges slants, slopes, and inclines towards the east, similarly, a bhikkhu, who develops and cultivates the four jhāna s slants, slopes, and inclines towards Nibbana.”
[SN V.308]
“There is no jhāna for the one without liberating wisdom,
no liberating wisdom for the one without jhāna ;
the one who has jhāna and liberating wisdom
he indeed is in the presence of nibbana.”
[Dhammapada v.372]