Śiva Purāṇa Rudra-saṁhitā, Sṛṣṭikhaṇḍa opens with an invocation that mentions the creation. But according to the Māṇḍūkya Upaniṣad, the creation is an illusion. So, why do we need to know about it? Because seeing the creation as illusion happens only in the highest stage of consciousness, turīya; and who can claim to be in turīya? Most of us are in ordinary dualistic consciousness , in which the material creation is seen as real.