True as it's said. And to be honest, this is something we quite often forget. At least I do. At times it can feel as if whatever you're doing got easier. But do know that it is YOU that got better at doing it, and not the "thing" that got easier ;
Sometimes, I receive the best motivation when someone tells me that I can't do something. In high school,. One of my favorite quotes related to this is that keeps me motivated is, "No great work is impossible. The word itself says I'm possible.