What to Think about

I don't know what to think, maybe there's nothing to realy concern about. Life is short, even we live 100 years, it's a short life, what we are supposed to do? Work, study and work much more, to occupy our minds and enjoy some moments that realy worth. Ok, people can be very bad and do things that they think it is correct, and they are defending some good cause. But im my irrelevant opinion, they are beeing selfish, only thinking in therirselves. Like the brazilian students says: Let's stop being selfish and think more in ourselves! Rs