I guess it depends on the definition of mastering, and moreover, whether you compare your ability with others. I would also like to believe that there are some

I guess it depends on the definition of mastering, and moreover, whether you compare your ability with others. I would also like to believe that there are some things mature adults have more to bring to the table when mastering something, such as a language, story telling, musical instrument... above all, regardless of whether you truely master something or not, you need to believe that you can - and whilst your comment may be true, it may also take away someones opportunity to believe they can. A good wakeup call nonetheless.