A reader recently pointed me to an article by Ueda Shizuteru -- http://worldwisdom.com/public/viewpdf/default.aspx?article-title=%E2%80%9CNothingness%E2%80%9D%20in%20Meister%20Eckhart%20and%20Zen%20Buddhism.pdf Nothingness in Meister Eckhart and Zen Buddhism -- which offers valuable insight into the nature of Zen Mind. Community commentary welcome!