Ajahn Brahm discusses the 128th sutta from Majjhima Nikaya: Upakkilesa Sutta, "Imperfections" or "Corruptions". 

Click here to read MN128 on Sutta Central.

"A second discourse set at the quarrel of Kosambi, this depicts the Buddha, having failed to achieve reconciliation between the disputing mendicants, leaving the monastery. He spends time in the wilderness before encountering an inspiring community of practicing monks. There he discusses in detail obstacles to meditation that he encountered before awakening," Sutta Central. 

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