The Related Suttas Collection 35.80

8. Sick

Giving Up Ignorance (2nd)

Then a bhikkhu went up to the Buddha … and asked him, “Sir, is there one thing such that by giving it up a bhikkhu gives up ignorance and gives rise to knowledge?”

“There is, bhikkhu.”

“But what is that one thing?”

“Ignorance is one thing such that by giving it up a bhikkhu gives up ignorance and gives rise to knowledge.”

“But how does a bhikkhu know and see so as to give up ignorance and give rise to knowledge?”

“It’s when a bhikkhu has heard: ‘Nothing is worth insisting on.’ When a bhikkhu has heard that nothing is worth insisting on, they directly know all things. Directly knowing all things, they completely understand all things. Completely understanding all things, they see all signs as other. They see the eye, sights, eye consciousness, and eye contact as other. And they also see the pleasant, painful, or neutral feeling that arises conditioned by eye contact as other. …

They see the mind, thoughts, mind consciousness, and mind contact as other. And they also see the pleasant, painful, or neutral feeling that arises conditioned by mind contact as other. That’s how a bhikkhu knows and sees so as to give up ignorance and give rise to knowledge.”