In fact, this column is also called the Pillar of Form. This is the passive, receptive, containing, feminine component to experience. In some Eastern systems this is Yin. It corresponds to the Vagina in coital union. When we are discussing the Sephiroth on the Pillar of Severity, we always find these aspects of experience at some level within them. It is described as "Severity" because the constrained nature of the underlying currents of the Sephiroth in this column are consciously experienced as more restrictive and grating than those in the prior column.