47: The keys to the Secret Doctrine, by H. P. Blavatsky.  See S. D., I, 343; note; II, 551.
1. Every symbol and allegory has seven keys.—S. D., II, 567; III, 3.
2. Only three keys available in the nineteenth century.—S. D., II, 543.  Compare II, 617, 842.
3. There are seven keys to the Entrance door to the Mysteries.—S. D., III, 178.  Compare I, 346; II, 330; II, 668, II, 731.
4. The keys, as hinted by H. P. B., are:
a. Psychological.—S. D., II, 25, note; I, 389.
b. Astronomical.—S. D., II, 25, note; I, 389; III, 198.
c. Physical or physiological.—S. D., II, 25, note; III, 198.
d. Metaphysical.—S. D., II, 25, note; II, 394.
e. Anthropological.—S. D., I, 389; III, 198.
f. Astrological.—S. D., II, 343.
g. Geometrical.—S. D., II, 494; III, 176.
h. Mystical.—S. D., I, 401.
i. Symbolical.—S. D., II, 561.
j. Numerical.—S. D., II, 198.
5. Each key must be turned seven times.—S. D., I, 22.
6. The Jews availed themselves of two keys out of the seven.
7. The Metaphysical key is available.—S. D., I, 338.  Compare III, 198.