This, explains Daisetsu T. Suzuki (1870-1966) in ※Zen and Japanese Culture,§ is how Japan*s most famous haiku came to be written:

Matsuo Basho (1644-94), samurai-born but a rootless wanderer most of his life, was a deep student of Zen. One day his Zen master Butcho paid him a visit at ※home§ 〞 a ※broken cottage§ by the Sumida River in Edo (present-day Tokyo). ※How are you getting on?§ the master inquired.

※After the recent rain the moss has grown greener than ever,§ replied Basho.