In a chance meeting, the Buddha, unrecognized by the bhikkhu Pukkusāti, teaches him to deconstruct experience into six elements, six fields of contact, eighteen mental explorations, and four foundations. He further reveals that all notions of self—such as “I am this” or “I will be that”—are mere conceptions, inherently afflictive, and the peace of Nibbāna is realized by overcoming all conceptual proliferations.