time is gearing

... and then a time comes when you realize life has passed and moments were lost and people aren't just as they used to be, just as you are no longer the same anymore and at this moment, you feel this tiny bit of sadness that makes you rethink every little choice that you once made that ended taking you where you stand right now. What about these moments? Should we validate them or should we just make the best of what is here now?