The second verse in sivagnana bodham is particularly important because it also points to the persisting human preoccupation, that is free will and determinism.
The verse says that the siva is in a state of two kind of relationships with the soul,
1. One with the souls 2. Away from the souls and independently
That is he stays away from the souls and yet inside the soul. This is a very difficult to imagine concept. The SGB says AWAYE-THANE states.
This awaye-thane position puts the soul in both self determined acts and the sivam controlled acts. Which is the one at a given time is not predictable. That means our actions are at a partially controlled state.
The sivam has the power eternally to do this mysterious duty. Man is eternally confused about his free will over his acts. He is destined to be so. He has to accept this. His vinais are not completely his own and it has dictats from sivam.
So, the second verse of SGB clears the major hurdle in our philosophizing. That is man is not master of his own house.