Focusing primarily on Soto Zen Buddhism as presented in the original writings of the Japanese scholar monk Eihei Dogen (1200-1253), and supported and elaborated by relevant contemporary scholarship in relation to the writings of the British psychoanalyst, Wilfred Bion (1897-1979), this book addresses the issue of how can one understand, assimilate, and integrate conceptions of the human mind that originate in the 13th and 20th Centuries, as they are visited and inflected by the unconscious preconceptions of a 21st-Century perspective.