Do no evil!

I don't know why do I write this article, but I feel that I should give myself a kind of limitation, everyone should do so right?
I just watched a tv program about London Keleidoscope anti-drug centre, saw those normal ppl there talking about their life before, I moved a lot with the wonderful enviroment there and the great mind of those people. I knew clearer about those hearts and soul. Although in China I also learned alot about drug's effective, but I never consider those people so close to me...I thought them all hiden some where as ghosts and dangerous people, although some of my friends had talked about it before．
Right now I understand that everyone's just the same, it's easy to be addicted to something, like cigarretts, alcohol or drugs, it's just that easy and un resistant. but it's truly there. It make ppl happy and despair, make ppl forgetive to this world, just think of it! like a devil...it kills and ruins...
When there was a beautiful British girl talked about her life before, her family're all drug takers, and she started to take drug while she was 13 years old, she stole before and saw some of her drug friends died of over taking it...
Now everything became normal, those people found their life back by the help of church and medicine methadone. I sincerely wish them have their hopeful lives in the future.
...
Google's demo is Do no evil so here I would claim and suggest all of my dear readers promise yourself never do evil for your own good.
I have a student who recently told me many times to quit smoking...He's my friend besides student, though I always play on him and drive him crazy :-p, hehe but after tonight, I really should seriously thinking of how to quit smoking now, it's really not good! I should admit that first...
Sleeping late is also not good for health. I am absent minded now...
Ok, do no evil! For our own good. Let's talk about this topic some other time when I am clear.