[593] Which is that form (rūpa) that is internal and a faculty (indriya)?
The eye-faculty (cakkhundriya) … the body-faculty (kāyindriya) — this is that form that is internal and a faculty.
Which is that form that is external and a faculty?
The femininity faculty (itthindriya), the masculinity faculty (purisindriya), the life-faculty (jīvitindriya) — this is that form that is external and a faculty.
Which is that form that is external and not a faculty?
The form sense base (rūpāyatana) … edible food as nutriment (kabaḷiṅkāro āhāro) — this is that form that is external and not a faculty.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.