Both Greeks and Romans believed that the gods would send messages to mortals, and the art of deciphering these messages was called divination. These messages could indicate whether the gods approved or disapproved of a particular action, or give an instruction to the mortals, e.g. to offer additional sacrifices. Anyone could engage in divination, but they believed certain people were more able to divine messages from the gods, such as oracles, prophets or soothsayers.