Messalianism is a heresy of Nestorianism.Ībsolute Cognatic Succession Law - Messalian rulers have access to the Absolute Cognatic Succession Law. Rulers can marry close kin to improve vassal opinions.Messalians may install women as priests.They have no formal rites and no strict church hierarchy. They also believe that Lucifer is the elder son of God and a force for good, and that incest is sacred since it was practised by the children of Adam and Eve. Each person is born with an inner demon, and only intense prayer can drive it out. Messalians believe that God can be perceived by the carnal senses, and that this perception is necessary to reach perfection.

The Messalians, or Euchites ('Those who Pray'), are a heretical Christian sect that originated in Mesopotamia, influenced by dualistic faiths like Zoroastrianism. In-game, Messalians can commit incest, considering it sacred as it was practiced by the children of Adam and Eve. They have male and female teachers whom they honor more than the clergy, the perfecti. Messalians teach that once a person has experienced the essence of God they are freed from moral obligations or ecclesiastical discipline. The name 'Messalian' comes from the Syriac ܡܨܠܝܢܐ ( mṣallyānā), meaning 'one who prays'. Messalianism is a Christian sect, condemned as heretical in a synod of 383 AD.

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