There's a saying I remember hearing somewhere...

That goes something like "Childhood teaches us what we want to do. Adulthood teaches us what we can't actually do with the older we get".

It's true

Youth teaches us values and ambitions

Maturity teaches us realism and limitation.

Doesn't matter who you are. Everyone has limits. I know I do. At some point, you WILL meet your limitations. And it might not be the most peaceful meeting or encounter. But it will teach you a lot about making realistic (and not just idealistic) self-assessments. Things factor in: The economy. Business. Society. The market. The culture.

Realistically speaking, there are MANY impossible things that exist for many people. Only a very select few people live with few impossibilities. Most people are all too aware of the impossibilities in their life. But the thing is, it's not so bad once you know other people have tried and gone through similar experiences. That is how the world works. Maturity is not knowing exactly what you can do. Maturity is knowing when to stop and knowing exaclty what you can't do. And what others can't do for you. And why all that is.