The Buddha gives an unusually long list of the hindrances to Jhana, starting with quarreling and ending with excessive concentration on forms.

For Bhikkhu Analayo’s comments on this sutta, see Upakkilesa Sutta, 2008.

Bhante Sujato pointed out that this sutta is likely a response to the Bṛhadāraṇyaka Upaniṣad 4.3 which claims that “man’s inner light” is his infinite, eternal “self.” The traditional Hindu commentary on this Upaniṣad (inline above) takes pains to respond to the Buddhist critique.