Bruce Lee quote - If you always put limits on everything you do, physical or anything else, it will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you MUST GO BEYOND THEM.
5 months into doing Crossfit, and I just started hitting the 9 ft. Didn't even know I could do it until suddenly, I did. It doesn't matter if you're the weakest person in the room, as long as you are making progress.