Them young 'uns

Theres a great quote relating to science which might hold the key to understanding the arrogance of youth.
"The key to true knowledge is knowing that you know nothing"
I realised something about growing up the other day. When you're a teenager, you think you know it all and everyone else is wrong. When you go to university you realise you had it wrong when you were younger and now you know it all! Then once you've been in the real world for some time you grow up and realise that you still have a lot to learn!
Slightly deep but let me know what you think.