When I was about 11 or 12 years old I thought that when I will be adult and I will have big house with big swimming pool. And I will spend everyday in the pool.
And now I am adult, I live in big house with the swimming pool. And I don't spend everyday in the pool. So, the lesson what I realize today is: we don't need everything what we want.
I knew this thing for a very long time but today it was so obviously.