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 term forearm describes the part of the upper limb between the elbow and the wrist. In a more common use, the term arm refers to the whole upper limb, with the terms upper arm and lower arm describing the two parts. In this section we will use the more common definition of arm to mean the whole upper limb.