a. Occult, esoteric
b. The concern for angels, demons, magical incantations, charms, witches, ghouls, interpretation of dreams, the date of the coming Messiah, numerology, and the name of God have been lumped together under the term Kabbalah (tradition).
c. The goal--mystical union with God
d. Zohar--compilation of Kabbalahlistic material
e. Evidence present since the beginnings of Judaism, become more popular in times of persecution, exile, like the medieval period