"A monk earnestly asked Zen master Umnon, 'What is Buddha?' Umnon replied, 'A dry shit stick.'
This dazzlingly brief exchange comes from a thirteenth-century compilation of koans: the 'Mumonkan' (Gateless Gate), one of the canonical books of Zen. To hear what it means, go ask a Zen master."
Sparks shooting from a flint;
A moment's blinking–
It's already missed.
from "Where the Heart Beats: John Cage, Zen Buddhism, and the Inner Life of Artists" by Kay Larson, p. 343, 344