This question popped into my mind while we sat staring at the wall last night. I remembered it and then went back to wall staring. Later, remembering it, I thought it was a frivolous, silly question, but then I remembered Joshu's answer about the dog. Maybe it's not such a silly question. Mu.
The first character in the above painting is the character for “Mu.” the two character taken together are “Mu Shin” and refer to the empty mind of Zen or sometimes Buddhism in general. This is a painting which hangs on my wall. I got it in San Francisco Chinatown one day about 15 years ago while in a card/paper shop which I often visited/ I lfirst learned at that time that the shop would be closing and the old man there would write calligraphy for you for a price. I asked him to write MuShin which he did for $15.00 ($7.50 a character), but he obviously was not familiar with the Buddhist meaning and muttered aloud about whatever for someone would want the characters for “no heart.” He still wrote beautiful characters and I enjoy seeing this everyday.