It is hard for us to conceive this, but time does not exist in spiritual reality. Time is an aspect of physical reality that no longer constrains us in spiritual life, just as we are no longer constrained by our physical bodies in spiritual life. That is what "forever" means in the Bible. It doesn't just mean "for a long time," "for the rest of your life" or even "until the sun expands and destroys the earth and all life here." It means to eternity without end.