Kabbalah maintains that spiritual repose can be trained and mastered. You can learn how to reinterpret reality. You can draw upon, and maintain, a positive disposition by catching "different fish" — by metaphorically changing your fishing style. You can become a happier and more likable person and also profoundly alter the chemistry of your body. You can obliterate the old grooves of fear and form new tracks, with new interpretations of old memories.

Laibl Wolf in Practical Kabbalah