The Sutta-Nipata, the Collection of Discourses, is one of the oldest texts in the Pali Canon and sits in the Khuddaka Nikaya. Fausboell, who translated it, judged much of it to be a remnant of primitive Buddhism: not the ordered doctrine of later monasteries but a picture of the early hermit life, with the first germs of a system showing through. The book is verse, gathered into five chapters, and it reads less like a treatise than like a set of songs and dialogues about how a free person lives.
The opening chapter sets the tone. In the Uragasutta the same refrain repeats down the page: the bhikkhu who has restrained anger, cut off passion, dried up craving, and found no essence in worldly existence leaves this shore and the further shore behind, as a snake quits its old skin. Liberation here is subtraction. What binds a person is removed root and branch, and what remains travels light.
Several discourses turn this letting-go toward solitude and toward bonds. The Khaggavisana Sutta counsels the seeker, having laid aside the rod against all beings, to wander alone like a rhinoceros, since affection for friends and family brings the pain that follows affection. The Dhaniya Sutta stages a quiet contest between a prosperous herdsman, secure in his cattle and house, and the Buddha, secure precisely because he owns nothing the rain can take. Where there are sons and cows there is care; where there is no possession there is no care.
The middle chapters define the Muni, the sage, and answer practical questions about the good life. To a questioner the Buddha says faith is the best property a person can have, truth the sweetest of things, and the life lived with understanding the best. By faith one crosses the stream, by exertion one conquers pain, by understanding one is purified. The Metta Sutta belongs here too, extending a boundless friendly mind, above, below, and across, to every creature without exception.
The fourth chapter, the Atthakavagga, is the sharpest and, in Fausboell's view, among the oldest. It watches rival teachers wrangle, each certain that only their own doctrine knows the Dhamma. The sage's response is not to win the argument but to drop it: having understood that all such views are things people lean on, the investigating Muni is liberated, enters into no dispute, and is not dragged back into renewed existence. Non-attachment, the book insists, reaches even to one's opinions.