Ajahn Brahmavamso discusses sutta 9 from the Dīgha Nikāya, the collection of long discourses: The Potthapada Sutta - With Potthapada.
"The Buddha discusses with a wanderer the nature of perception and how it evolves through deeper states of meditation. None of these, however, should be identified with a self or soul.", Sutta Central.
Read DN9 on Sutta Central here.
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