Ajahn Buddhadasa worked painstakingly to establish and explain the correct and essential principles of the original realization of the Lord Buddha before it was buried under commentaries, ritualism, clerical politics, and the like. His work was based in extensive research of the Pali texts (Canon and commentary), especially of the Buddha's Discourses (Sutta Pitaka), followed by personal experiment and practice with these teachings. Then he taught whatever he could say truly quenches dukkha (dissatisfaction, suffering). His goal was to produce a complete set of references for present and future research and practice. His approach was always scientific, straight-forward, and practical.