2.
The Discourse on Failed
814.
"For whomsoever, monks, the four bases for spiritual power have been missed, missed for them is the noble path rightly leading to the elimination of suffering.
For whomsoever, monks, the four bases for spiritual power have been undertaken, undertaken for them is the noble path rightly leading to the elimination of suffering.
Which four?
Here, monks, a monk develops the basis for spiritual power that possesses concentration due to desire and volitional activities of striving, concentration due to energy, etc.
concentration due to mind, etc.
develops the basis for spiritual power that possesses concentration due to investigation and volitional activities of striving.
For whomsoever, monks, these four bases for spiritual power have been missed, missed for them is the noble path rightly leading to the elimination of suffering.
For whomsoever, monks, these four bases for spiritual power have been undertaken, undertaken for them is the noble path rightly leading to the elimination of suffering."
The second.