Buddhadasa Bhikkhu (1906-1993) was a famous and influential Thai Buddhist philosopher, widely known as an innovative reinterpreter of Buddhist doctrine and Thai folk belief. Buddhadasa fostered a reformation of conventional religious perception in his home country, as well as abroad. Although he was an ordained Buddhist monk, he rejected specific religious identification and considered all faiths as principally one. Since the 1960s his work has inspired a new generation of socially concerned individuals around the world. He is the author of numerous works, including Mindfulness with Breathing: A Manual for Serious Beginners.