6.
The Discourse on Being Established
526.
"For a monk established in one thing, monks, the five faculties have been developed and well developed.
In which one thing?
In diligence.
And what, monks, is diligence?
Here, monks, a monk guards the mind regarding mental corruptions and regarding states with mental corruptions.
For him guarding the mind regarding mental corruptions and regarding states with mental corruptions, the faith faculty also goes to fulfilment through development.
The energy faculty also goes to fulfilment through development.
The mindfulness faculty also goes to fulfilment through development.
The concentration faculty also goes to fulfilment through development.
The wisdom faculty also goes to fulfilment through development.
Thus too, monks, for a monk established in one thing, the five faculties have been developed and well developed."
The sixth.