[449] Dependent on a phenomenon (dhamma) that does not have an external object (na-bahiddhārammaṇa) and is not visible and impinging (na-sanidassanasappaṭigha), a phenomenon that does not have an external object and is not visible and impinging arises by root condition (hetupaccayā). Dependent on a phenomenon that does not have an external object and is not visible and impinging, a phenomenon that does not have an external object and is not invisible and impinging (na-anidassanasappaṭigha) arises by root condition. Dependent on a phenomenon that does not have an external object and is not visible and impinging, a phenomenon that does not have an external object and is not invisible and non-impinging (na-anidassana-appaṭigha) arises by root condition: six.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.