一部经，佛陀以手中一把树叶为喻，说明他所揭示的苦、集、灭、道方能导向涅槃，而未曾揭示的知识虽如林中树叶般浩瀚却无此功用。

A discourse in which the Buddha, using a handful of leaves as simile, teaches that what he has revealed — suffering, its cause, cessation, and the path — is what conduces to nibbāna, unlike the vastly greater unrevealed knowledge.