The Buddha explains to the brahmin Jāṇussoṇi how he overcame fright and dread while practicing seclusion in remote lodgings in the forests and woodlands, leading to the three true knowledges and full awakening.

An analysis of the four bases of psychic abilities that are endowed with collectedness arising from aspiration, determination, purification of mind, and investigation.

The Buddha explains the three guiding authorities for developing wholesome qualities and maintaining purity - 1) Oneself, 2) world, and 3) Dhamma.

The Buddha uses the gradual purification of gold as a metaphor for mental cultivation through meditation. Just as a goldsmith removes coarse, medium, and subtle impurities until the gold is workable and radiant, a meditator abandons defilements in stages. This gradual refinement leads to deep collectedness of mind, forming the foundation for supernormal abilities and, ultimately, liberation.