The Lord (isa) supports all this together, the perishable and the imperishable, the developed and the undeveloped. The (living) self, not being a lord, is bound, because he has to enjoy (the fruits of works); but when he has known the god (deva), he is freed from all fetters.

In plain words: God holds everything together, both what changes and what never changes, both what is seen and what is unseen. The soul feels trapped because it must live with the results of its actions. When it comes to know God, it is freed from everything that binds it.