Ask someone who is much older than you and you will find that they remember some facts and experiences extremely crystal clear and accurate and then there are some facts and experiences that seem to escape them. And then there are facts and experiences that are remembered a little differently than they actually occurred. School was much harder or easier than it actually was. Life was much harder or easier than it actually was. Athletic accomplishments are usually much better than they actually were. Time erodes memory. Our memory doesn't hold on to the truth as much as we assume it does. This is to our benefit when it comes to unpleasant experiences. That is why the phrase "time heals all wounds" exists. However, time also erodes our memory and we forget how hard we worked to get to where we are now. You need to constantly remind yourself how hard you worked to get where you are now. That memory will give you a foundation to build your confidence. And after you remember how hard you have worked and how much you have accomplished, take that knowledge and work harder and smarter and improve even more.