All of these people died in faith without receiving the promises, but they saw the promises from a distance and welcomed them. They confessed that they were strangers and immigrants on earth.
People who say this kind of thing make it clear that they are looking for a homeland.
If they had been thinking about the country that they had left, they would have had the opportunity to return to it. But at this point in time, they are longing for a better country, that is, a heavenly one.
Therefore, God isn’t ashamed to be called their God—he has prepared a habitation for them.
Is Heaven static (is everything to be done or enjoyed predetermined or fixed by God), or is it progressive (is it open to being added to and improved upon, etc.)?
(I am not speaking of progressive in the political sense of course, but in the sense of actual and real progress.)
For instance as more and more human souls are added to Heaven (and God only knows what other kinds of creatures and beings) does Heaven expand, and does God allow or even encourage those dwelling there to explore, to discover, to conduct scientific experiments, to create, to do art, to invent and design things, and so forth given the parameters under which Heaven operates? (Which I assume will involve different technologies and physics and biological and operating principles, if those are even the proper terms, than in our world.)
I cannot say for certain but it seems to me, and this is something I have long pondered, that if this world, as imperfect as it is, is open to invention and creation (or at least sub-creation) and experimentation and discovery and exploration and expansion and progress then I can only imagine how open to good and noble progress Heaven will and ought to be.