Nothing is impossible…if you want it bad enough.
I topped out at 73 as a freshman in high school. I just wanted a chance to play college baseball.
I topped out at 95mph two weeks ago as a senior in college. Some people told me I would never throw that hard (including one of my idols - a well known "guru" that I still look up to), others including my coach freshman year of college told me what I would become before I even knew what I was capable of.
It doesn't matter what others think. It matters what you think and how bad you are willing to work to achieve it. Even when I threw 73, there was never a fiber of my being that didn't believe I was capable of throwing a baseball 90 mph. I knew that there was some way, somehow that I could build my body up to that level and learn how to move my body through space and apply enough force to the baseball to achieve that goal. I just knew it, even when I struggled, and even when I had worked 5 years and still not achieved the goal.
But the results did come. And I'm just getting started.
There is always a way, and there is always someone out there who can show you the path when you lose your way.