Yeats had a lifelong interest in mysticism, spiritualism, occultism and astrology. Kaspar Schwenkfeld and Sebastian Franck were influenced by German mysticism and spiritualism. Scripture, prevailing mysticism and popular piety. Amebix were also interested in various forms of mysticism and Gnosticism. He was wary of allied decadence, complacent, corrosive of an innocent romanticism expanded into mysticism. Bertrand Russell presents Heraclitus as a mystic in his "Mysticism and Logic". Other Protestant movements grew up along lines of mysticism or humanism (cf. These range from proposals by mainstream physicists to the more occult ideas of quantum mysticism. Other Protestant movements grew up along the lines of mysticism or humanism (cf. They delved into transcendentalism, mysticism, and yoga. Himmler was interested in mysticism and the occult from an early age. The Roerichs' commitment to occult mysticism increased steadily. There are several anecdotes about Iltutmish's childhood interest in religious mysticism. Albert Schweitzer presented the classic account of mysticism and morality being incompatible. Its early members imbued the order with a mysticism and learning.