According to the school of Kashmiri Shaivaites entitled Spanda,the central role for a human devotee is not played by Shiva but by the Shakti.This is not paradoxicalbecause in the spiritual vision of Shaivism ,Shiva and Shakti are not two separate realities.
Shiva and Shakti are two in oneand they seem separate only for the ignorant and limited mindthat is subjectedto duality.
In truth Shiva is Shakti and Shakti is Shiva,when we have conciousness,there is energy.
When we have energy there is conciousness,who animates that energy.
Therefore for the aspirant to spiritual liberation,the instrument[path]is Shakti
and not Shiva.
Shiva is the trancendent aspect of the divine being ,beyond any mental representation.
anything we could imagine about Shiva is not Shiva because Shiva cannot be defined,cannot be thought,cannot be revoked.
The tale about Shiva splitting into two halves of male and female indicates the origin of Ardhanarishwar
the union of spirit of material,the Being and its force.He is above spirit and material.
Shiva is also described as Anaadi[without beginning/birth] and Ananta[without end/death].