Ceraunomancy

Indeed as DeMille in 1956 filmed the Decalogue, God inscribes each commandment literally with a bolt of lightning. Because the film functions to read the signs of the times, the practice here invokes ceraunomancy (divination by lightning).

Whether or not that is true, the equal weight given to public and private contexts in the sources for Etruscan ceraunomancy certainly does provide a corrective to our literary sources and their preoccupation with public divination whence one might be led to believe that traditional divination was exclusively public or communal in nature prior to the first-century..