According to an account pieced together by some of the Fathers of the ChurchFathers of the Church Christian leaders and thinkers, living mostly between the end of the first century and the eighth century, whose writings (including biblical commentaries, sermons, histories, poetry and biography) were considered to carry particular authority. Key figures included St Ambrose (b. 340), Bishop of Milan (374-397), St Jerome (340/2-420) and St Augustine (b. 354), Bishop of Hippo in North Africa (396-430). The term can also refer more generally to the many churchmen who were deemed to be authoritative commentators on doctrinal, theological, liturgical and biblical matters between the 1st and 12th centuries. from scattered biblical allusions, a number of angels had rebelled against God. Their leader LuciferLucifer (Latin 'light-bearer') Synonym for the Devil. (lightbearer) had sought to claim equality with God (Is. 14: 12-15) and together with his followers had been cast out of heavenHeaven The dwelling-place of God and the angels and eventually all those who will live with God for eternity. (Rev. 12: 7-9) to dwell henceforth in hell. Lucifer became SatanSatan Hebrew satan 'adversary'. See Fall of the Angels (Hebrew satan ‘adversary’), the Devil, and his followers became demons seeking constantly to alienate humankind from God, thus turning the world into a spiritual battlefield.