You have come from a place of absolute reality where there are no questions and the answer is fully experienced to a place where there are innumerable questions and no apparent answers and, therefore, no foundation for true experience. For only reality can be truly experienced, and any substitute for reality can only be entertained and imagined for a certain period of time.
This is why the world can only be experienced for a certain period of time. Everything in it can only be experienced for a certain period of time. That is why your span of time in the world is limited.
For you to experience the world permanently, the world would have to be like your Ancient Home from which you have come. This would not be the world that you currently experience. This would not be the world which you currently share with others. In fact, it would not be the world at all.
The emphasis here is not to attempt to make the world perfect but to bring your experience of your Ancient Home into the world so that the evolution of the world may be served and furthered.
In this way, you may make your specific contribution while you are here so that the separation between this place and your Ancient Home may be dissolved.
Passage from Relationship and Higher Purpose, Chapter 1.