I was joking about how so many of the exercises we do in group training have to be modified for my size and some limitations coming back from injury. This perfectly fit-looking girl explained that she still has to modify some things as well, after having suffered an injury. I see her all the time yet never realized that she was modifying - probably because I was so busy modifying and focusing on myself. I then had a lightbulb moment where it sunk in that I didn't have to worry about what others thought of me or that they were watching me, snickering that I couldn't do the exact same exercise they were doing. Everyone is focused on themselves - just as it should be.
Embrace the now: your body now, your mindset now, your weight now, your physical ability now. We have no way of changing the past that led us to the spot we're in today. You'll never get to your destination if you don't take the first step.