”As Mary started to sing, the archangel Gabriel smiled. Of all the things humans could do with their voices, singing was his favorite. It  wasn’t that their singing was always perfect — far from it. Unlike the angel choirs, whose harmonies always blended perfectly, who never lost track of the tempo, who followed the conductor with unwavering attention, so many factors affected human song: dryness in the throat, cold and flu season, shyness, the ridiculous notion some humans believed that only some people can sing, or should. But more than anything else, Gabriel had noticed, human singing was affected by emotion. After hearing his news (always good news), humans could sing with such deep joy it brought him to tears.”