 A consideration that has motivated many Buddhists to vow to follow rules of moral discipline is a wish to avoid the karmic consequences of actions that harm others. These consequences have traditionally been understood largely in terms of rebirth in the various realms of cyclic existence. In the earliest texts, there are five such realms: the hells, the worlds of hungry ghosts, animals, and humans, and the heavenly worlds of the gods (Skt. deva). Later texts add a sixth realm, that of the titans (Skt. asura).