In theology, dualism may also refer to "duotheism", "bitheism" or "ditheism". This the doctrine or belief that there are two independent divine beings or eternal principles, one good and the other evil. Examples of ditheism include Zoroastrianism, Wicca and Marcionism. Although the Bible mentions Satan, this is not ditheism as he is not equal to God, but merely an angel. (See Epistle of Jude, verse 6). Ditheism is not the same as dualism, but they are similar. Ditheism implies (at least) two gods, while moral dualism does not imply any "-theism" (belief in a god) whatsoever.