The 3 domains of the Noble 8-Fold Way:

A former husband
Visākha
of the Nun (Bhikkhuni)
Dhammadinnā
once asked her:
Venerable
Dhammadinnā, are these 3 domains of morality
(sīla), concentration
(samādhi),
and understanding (pañña)
included in the
Noble 8-fold Way,
or is it
rather instead the
Noble 8-fold Way that is included
& divided into these 3 core
domains of the training?
These 3 domains,
Visākha,
are not included in the
Noble 8-fold Way,
but rather
the
Noble 8-fold
Way is included in those 3 domains like this:
Right
speech, right action, and
right
livelihood: These 3 things are included
in the domain of morality.
Right
effort,
right
awareness, & right concentration: These
2 things are included
in the domain of concentration..
Right view
and right motivation: These
2 things are included
in the domain of understanding...