So true. I remember exactly how I felt, after I went to study and live on my own when I was 19 years old. It's from that point on, and double from the time you start working fulltime, that you realise how the world really works. And how lucky you are to have two loving parents that sacrificed everything for your happiness and well-being. On whom you can always rely and who love you unconditionally.
For all those parents with difficult teens, I think it's best to keep in mind, that they will appreciate what you did and do for them, when they are older. It all seems to be a part of the circle of life. I'm not a parent yet, but I'm guessing it'll be all worth it in the end.
Well said!