But I don't have to know an answer. I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose, which is the way it really is, as far as I can tell, possibly. The Universe won't last forever.
Nothing is forever, except for the fact that nothing is forever.
By the definition of the universe, the nature of being, nothing can be more natural, more fundamental to everything . But of course it scares us. As creatures who live only a few levels beyond their instincts, we like things to be consistent. Stasis might be boring, but predictable is safer than chaos. And we want to extend that desire for predictability for as long as we can imagine, which is forever.