9.
The Discourse on the Internal Factor
230.
"Taking an internal factor into account, monks, I do not perceive any other single factor for the arising of the seven factors of enlightenment, as does, monks -
wise attention.
For a monk accomplished in wise attention, monks, this is to be expected -
he will develop the seven factors of enlightenment, he will cultivate the seven factors of enlightenment.
And how, monks, does a monk accomplished in wise attention develop the seven factors of enlightenment, cultivate the seven factors of enlightenment?
Here, monks, a monk develops the enlightenment factor of mindfulness, based upon seclusion, etc.
He develops the enlightenment factor of equanimity, based upon seclusion, based upon dispassion, based upon cessation, maturing in release.
Thus, monks, a monk accomplished in wise attention develops the seven factors of enlightenment, cultivates the seven factors of enlightenment."
The ninth.