 He also wrote the "Vita Eulogii" (‘The Life of Eulogius’), a biography of his close friend and fellow theologian Saint Eulogius of Cordoba.Although Christians living in Córdoba and the rest of Muslim Iberia during his time lived under relative religious freedom, Alvarus was amongst the Christians who perceived the many restrictions on the practice of their faith to be unacceptable persecution; they regarded with extreme scorn Christians who participated in the Muslim government, converted to Islam, or simply concealed their true beliefs.As a result of these religious tensions Alvarus's writings are characterized by contempt of all things Muslim and he considered Muhammed to have been the precursor to the Antichrist.