The Book of the Master of Heavenly Seclusion (天隐子) is an ancient Daoist practice manual. It was written in the 8th century during the Tang Dynasty. Nothing is known about the Master of Heavenly Seclusion besides his name. However, the preface to the manual was written by Sima Chengzhen (司马承祯). Sima Chengzhen, also known as…
