Are You One of Them?

Why is it that there are really people who are fond of talking behind your back? Whose only purpose here on earth is to talk sh*t (sorry for the foul word) about you, whose sole objective is to bring you down. Who likes to say words against you, who curse you without your knowing, why do they exist when in fact, we don't actually need them to make this world a better place. I don't want to be mean or something, but I just let karma do it on its own time.