The first koan in The Gateless Gate is "Zhaozhou's Dog".
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history
Compiled in 1228 by the Chan monk 无门慧开 (1183–1260), it gives 48 koans, each with his comment and a short verse. It is far better known in Japan, as the Mumonkan, where Zen monasteries still train with it.
culture
His verse on the koan "the ordinary mind is the Way" (平常心是道) is the much-quoted 春有百花秋有月，夏有凉风冬有雪.
