[350] Therein, what is ignorance (avijjā)?
That which is unknowing, unseeing, … the bar of ignorance, delusion (moha), the unwholesome root (akusalamūla) — this is called ignorance. …
Therein, what is feeling (vedanā) with contact (phassa) as condition?
That which is mental, neither ease nor unease; what is felt as neither painful nor pleasant, born of mind-contact (cetosamphassa); the neither-painful-nor-pleasant feeling born of mind-contact — this is called feeling with contact as condition. …
Therefore it is said: "Thus is the origin (samudaya) of this whole mass of suffering (dukkha)." …
[The Sixth, Seventh, and Eighth Unwholesome Minds (citta)]
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.