This yoga means the union of the male principle Shiva and the female principle Shakti. It is represented by three symbols and all are abstract but abstraction moves from the simple to the complex.
What is Shiva Shakti Yoga?
The first combines the original representation of the Yoni circle with the mountain as the Phallus. The second represents two nuclei or energies, the male and female coming together and the third represents a six pointed star made up of two triangles with one inverted. All these symbols represent perfect union and enlightment.