The occult significance of Aquarius is knowledge. Aquarius, the sign of the water bearer, is an eminently revolutionary sign. There are four types of knowledge or secret science. We need to know what these four types of knowledge are.
Upper limb. The upper limb or upper extremity is the region in a vertebrate animal extending from the deltoid region to the hand, including the arm, axilla and shoulder.
The deep veins of the upper extremity. The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front. Front of right upper extremity, showing surface markings for bones, arteries, and nerves.