?? ???? ??? a deep and multifaceted concept . ??? ???? ?? the world beyond, ????? ???? ??? purpose ?????, ????? to reveal ?? the mystery ?? ????? . In Jewish culture , ?? ???? ??? ???? ?????? ????? . According to many ???? ??? ??? ??????? ?? ???? ?????? ???? . ?? ???, , some ????? ??? skeptical of this concept.. ??? ?? ??? ???