Augustin begins with praise, and the whole book vibrates with praise. He says elsewhere (in Ps. cxlix.), that “as a new song fits not well an old man’s lips, he should sing a new song who is a new creature and is living a new life;” and so from the time of his new birth, the “new song” of praise went up from him, and that “not of the lip only,” but (ibid. cxlviii.) conscientia lingua vita.