I don't mean just seeing something nice and wanting to have something like that. Some people would not mind doing anything to take what belongs to another. Why do we have people like that?
Our mind always wanted new things, it will always want to expand and is easily bored that's why we must have the control over our mind or our mind will control us.
We desire things that we dont have , and if we have these things in our hands already, we want more. That is because it is our nature not to be contented and satisfied. Humans can never achieve satisfaction because we want more and more.