References – Snp 4.5: Eight on the Ultimate 
“Snp 4.5 and Snp 4.6 refer to what is seen, heard and thought. Is there more to this than developing awareness of what you’re thinking, hearing, and seeing?” Answered by Ajahn Pasanno. [Sense bases] [Direct experience]
Can We Function without Attachment? [2017], Session 3, Excerpt 6
Readings by Ajahn Pasanno:
The Island by Ajahn Pasanno and Ajahn Amaro, Chapter 14, pp. 256-258:
Suttas: Snp 800-3; MN 2.7-8; MN 109.15-18.
Sutta: MN 2: Sabbāsava Sutta.
Sutta: MN 109: Mahāpuṇṇama Sutta.