“Despite his ability to attract students, he seems to have spent much of his time in a state of perpetual despondency, loneliness everywhere crowding in on him. No doubt this state of mind was compounded by chronically poor health, but Bashō was also engaging true sabishi, a spiritual loneliness that served haikai culture in much the same way mu or ‘nothingness’ served Zen.”

Sam Hamill, Narrow Road To The Interior (Page XXXI)