4.
The Discourse on Gratification
129.
They were dwelling at Bārāṇasī in the Deer Park at Isipatana, etc.
Seated to one side, the venerable Mahākoṭṭhika said this to the venerable Sāriputta -
"'Ignorance, ignorance', friend Sāriputta, is said.
What indeed, friend, is ignorance, and in what way is one gone to ignorance?"
"Here, friend, an ignorant worldling does not understand as it really is the gratification, danger, and escape regarding matter. In feeling, etc. in perception, of activities... does not understand as it really is the gratification, danger, and escape regarding consciousness. This is called, friend, ignorance; and to this extent one is gone to ignorance." The fourth.