Commentators differ as to whether the apostle Peter authored II Peter, and to whether I Peter and II Peter have the same author. However, II Peter explicitly states that Peter was the author, and the different styles of the amensuenses (Sylvanus, the case of II Peter), may account for the other differences. II Peter is mainly concerned with the problem of Christians who deliberately sin, which may be an early form of Antinomianism. Peter sees the end of the world as coming with fire, which may have inspired some Gnostic works.