 This commentary on the "Secret of the Golden Flower", a Taoist alchemical text believed to be from the twelfth century, was first published by Jung and Richard Wilhelm in 1929.It was revised in 1938 with an additional foreword by Jung.In his opening statements, Jung asserts that "Science is the tool of the Western mind […] and it obscures our insight only when it claims that the understanding it conveys is the only kind there is."