Yes, the very same zone which we try to cling on to is expandable leading to more things we can hold on to :p
This point of view was triggered from Tim Ferris book. Here is the quote from the book:
… risks that expand our sphere of comfortable action are all examples of eustress- stress that is healthful and stimulus for growth.
Usually, we are reluctant to step out of a comfort zone and there could be many factors behind it. But, when we do step out and do something, we actually expand our comfort zone and bringing that new thing in.
E.g. I did not know how to vlog in public and it felt way out of my comfort zone. As I started to push myself to do it, I got comfortable with it and vlogging in public became okay!
This simple shift in looking at things can help us expand capabilities and possibilities.