Possible Clues:

• Jewish mystical tradition
• Welsh water taxi's introducing hidden depths here
• Pop group among 150 supported by a Jewish system of belief
• Mystical Bible interpretation of the Jewish faith
• Taxi by Welsh lake seen in esoteric lore
• Secret beliefs Ali once briefly had about 1970s' group
• California bishops prepared with special scripture reading
• Jewish mysticism
• Mystical Jewish Bible interpretation
• Secret mystical tradition of Jewish rabbis