Once the Blessed One was staying at Kosambi in the rosewood forest. Then, picking up a few rosewood leaves with his hand, he asked the monks:
—Which are more numerous, the few leaves in my hand or those overhead in the forest?
—The leaves in the hand of the Blessed One are few in number, Lord. Those overhead in the forest are more numerous.
—In the same way, those things that I have known with direct knowledge but have not taught are far more numerous than what I have taught. And why haven’t I taught them? Because they are not connected with the goal, do not relate to the essentials of the path, and do not lead to disenchantment, to dispassion, to cessation, to tranquility, to direct knowledge, to self-awakening, to liberation. That is why I have not taught them.
—Buddha Shakyamuni, Rosewood Sutra