“Holiness, whether ascribed to popes well-known to history or to humble lay and religious figures, from one continent to another of the globe, has emerged more clearly as the dimension which expresses best the mystery of the Church. Holiness, a message that convinces without the need for words, is the living reflection of the face of Christ.” (Pope John Paul II)
The quote speaks for itself, eh? Holiness, as John Paul II reflected, is the way in which we bring the living Christ to the world.