Siva is in All, Blessing and Pervading Each Soul.

Siva is in all: the worshipping couple and priests, the student, the fashionista, the wealthy woman and the two men arguing about God.

Image of Satguru Sivaya Subramuniyaswami
The causal plane is the abode of Lord Siva and His entourage of Mahadevas and other highly evolved souls who exist in their own self-effulgent form--radiant bodies of centillions of quantum light particles.
—Gurudeva