By Rodney Pelletier, Church Militant - The pope is calling a proposed dogma that Mary is mediatrix of all grace "foolishness."… During a homily given in Rome on Thursday for the feast of Our Lady of Guadalupe, Pope Francis said the Blessed Virgin Mary "never introduced herself as co-redemptrix," adding, "She never wanted for herself something that was of her Son."… His Thursdsay comments touched on the proposed fifth Marian dogma — subject to ongoing debate by theologians — which describes Mary as advocate for sinners, mediatrix of grace and co-redemptrix.