Time healing wounds is a difficult concept. As humans it seems we are predisposed to believing things will always be one way or another when life is difficult.
For those that suffer panic or anxiety disorders, it seems like this trait is exaggerated even more so. It is difficult to look past the anguish of the moment to realize that it will pass. It is nearly impossible to view the possibility of getting better when many hours are spent in torment.
The important thing is to remember that nothing lasts forever.
Maybe the most beneficial way to move past those moments of tunnel vision is to focus more on the days you felt good. It is easier to focus on what we are feeling in the moment but when you force yourself to remember what it was like BEFORE panic or anxiety took over, it is easier to imagine that you will get back to that point again.
Its like having a paper cut. The more attention you give it, the more painful it becomes but if you clean it up and move along it is less likely to be such a big part of your day. Perhaps some day you can view panic and anxiety the same way. Annoying but survivable.