First Creation is groupish - Second Creation is individual

The Primary Creation is groupish, because it is universal: the creation of everything that is created, for everything that is created.  

We all inhabit the First Creation - and can only "opt-out" in the sense of annihilating awareness of our self as a distinct entity. 

Second Creation is personal, individual... 

Because the Second Creation is "opt-in" - Heaven is accessed by a decision/ action of a specific person. Heaven is not universal; it is inhabited by those who have chosen it.