Taisen Deshimaru Roshi, born in Japan in 1914 of an old Samurai family, was a close disciple of the famous Zen master Kodo Sawaki. He took it as his life's mission to transmit the authentic teaching of Zen Buddhism to the West. Based in Paris since 1967, Taisen Deshimaru taught Zen for 15 years all over Europe. At the time of his death in 1982, he had published 15 books in various languages and gathered a following of many thousands from all over the world, including some of the most sophisticated minds of the West. Taisen Deshimaru never taught clerical ritualized Buddhism. Philippe Rei Ryu Coupey, born and raised in New York City, is a Soto Zen teacher in the lineage of Kodo Sawaki. He met Master Deshimaru in 1972 and followed him as a close disciple. Having studied literature at the Sorbonne, he worked with Deshimaru on the latter's teaching. Three books came out of this collaboration, including this current volume. Today, after 40 years of Zen practice, Coupey directs a large community of practitioners in Europe, in a lineage directly transmitted from master to disciple. The practice is shikantaza: simply sitting, without goal or profit-seeking mind.