Six people form Herzegovina have testified for thirty years that they have regular or periodic appearances of the Virgin Mary. Who are these four women and two men and why were they chosen to be, in Medjugorje, mediators between Heaven and mankind? And why did they deserve such grace? "God does not choose the best to fulfill His plans. We are only instruments in His hands", replied the Medjugorje visionaries, grateful for not knowing themselves by what criteria they were chosen for this role.