a man passes himself off as an ambassador or herald of the state and enters into unauthorized negotiations with a foreign power, or, when actually sent on such a mission, delivers a message other than the one with which he was sent or contrariwise if he is shown to have misreported, in his capacity as an ambassador or herald, the communications which enemy or friendly states have given him, he must be open to prosecution for violating the law by impiety against the pronouncements and instructions of Hermes and Zeus.