[630] Which form (rūpa) is internal (ajjhattika) and is not continuity of form (santati)?
The eye sense base (cakkhāyatana) … the body sense base (kāyāyatana) — this form is internal and is not continuity of form.
Which form is external (bāhira) and is continuity of form?
That which is the growth (upacaya) of form, that is the continuity of form. This form is external and is continuity of form.
Which form is external and is not continuity of form?
The form sense base (rūpāyatana) … edible nutriment (kabaḷīkāra āhāra) — this form is external and is not continuity of form.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.