Concurrently with his music career, he has studied comparative religion, esoteric knowledge and philosophy since 1965, and from 1988 he has focused on Aramaic, Christian and Jewish mysticism.
Har siden 1965, sideløbende med musikalsk virke, studeret sammenlignende religion og filosofi, og har siden 1988 specialiseret sig i aramæisk, samt kristen og jødisk mystik.