[653] What is that form (rūpa) which is a primary element (mahābhūta) and is gross?
The sense base of tangible objects (phoṭṭhabbāyatana) — this is that form which is a primary element and is gross.
What is that form which is a primary element and is subtle?
The water element (āpodhātu) — this is that form which is a primary element and is subtle.
What is that form which is not a primary element and is gross?
The eye sense base (cakkhāyatana) … the taste sense base (rasāyatana) — this is that form which is not a primary element and is gross.
What is that form which is not a primary element and is subtle?
The femininity faculty (itthindriya) … edible food (kabaḷiṅkāro āhāro) — this is that form which is not a primary element and is subtle.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.