Shhh.... Saints are Talkin'
Joan hears the whispers.
It was at the age of thirteen and a half, in the summer of 1425, that Joan of Arc first became conscious of that manifestation, whose supernatural character it would now be rash to question, which she afterwards came to call her "voices" or her "counsel." It was at first simply a voice, as if someone had spoken quite close to her, but it seems also clear that a blaze of light accompanied it, and that later on she clearly discerned in some way the appearance of those who spoke to her, recognizing them individually as St. Michael (who was accompanied by other angels), St. Margaret, St. Catherine, and others. Joan was always reluctant to speak of her voices. She said nothing about them to her confessor, and constantly refused, at her trial, to be inveigled into descriptions of the appearance of the saints and to explain how she recognized them. None the less, she told her judges: "I saw them with these very eyes, as well as I see you."
Read more on the Catholic Encyclopedia.