This question may be silly....but it is important in our life.........as a human being we should follow some ethics in our life whether it is useful for us not....how abt u.......?????
I for one have my own code of ethics that I try to live by. I try not to lie, cheat or steal. If you can do these 3 plus add a few others like trying to be a good person and not harm others I think you will make it far in life.
