It’s not possible is a sentence that should always make you alert.
Certainly, somebody must have said it’s not possible for any of the things we today take for granted. It’s an easy way to safeguard someone’s own experience, to avoid facing possible shortcomings, to retain power.
And challenging it’s not possible does not mean that everything is possible. It just means that you are open to a different world and you are seeking a more thorough explanation about why that should not be achievable.
It’s the way of change.