You're only as good as you are when you're doing that which you should be doing.
There is a story about a group of comic book lovers that got together and made their own comics. The story is long and convoluted but the results are legend. Have you heard the curious tales of the wild and wonderful Wappies?
If you do anything for too long it will start to hurt. What is your level of pain tolerance?
The thing that happens while you are here.
The thing that causes you not to be here anymore.
The price you pay to be here and do the things you do.