Sandra explains the two main movements of energy in the tantric view of the universe: Expansion and Contraction. These two movements are manifested in every aspect of life and our bodies, in the physical body and also in the subtle body. When these two energies are in balance, the equilibrium brings us to our essential state of freedom and peace. When they are imbalanced, they cause suffering. Sandra explains how insight into the manifestation of these two forces can be used in a yoga practice, to find the center and to help find the place of balance within ourselves.