One night he heard in a vision someone saying to him, "Rejoice Benjamin, you will shepherd the flock of Christ." When he told that to his spiritual father, he said to him, "The devil wants to hinder you. Beware of pride". Thenoas later brought Benjamin before the sitting Patriarch,
Andronicus. Andronicus appreciated Benjamin's piety and ability, and took him on as a servant. He later ordained Benjamin to the priesthood, and eventually appointed him as his assistant, making Benjamin the heir presumptive to the patriarchy. In his position as assistant to the patriarch, Benjamin became acquainted with the intricacies of church affairs and within the Coptic Christian community. Benjamin became highly regarded for his work both within and without the church, which helped bring about his election to the patriarchate upon the death of Andronicus. The Arab Muslim general
'Amr ibn al-'As began his campaign to conquer Egypt in 639, eventually invading Alexandria itself on 17 September 642. History does not record whether the members of the Coptic church assisted the Arabs in this campaign, although it is known that they did help the Melkites. However the Syriac chronicle of
Dionysius I Telmaharoyo explicitly says that "Benjamin, the patriarch of the Orthodox in Egypt at that time, delivered the country to the Arab general ‘Amr b. al-‘As out of antipathy, that is enmity, towards Cyrus, the Chalcedonian patriarch in Egypt". During this time some individuals took the opportunity to ransack and burn churches. St. Mark's Church on the seashore was plundered, as well as the churches and monasteries that were surrounding it. He then left Alexandria again, to meet with 'Amr. In the historic meeting between these two individuals, 'Amr is quoted as having said that he had never seen such an impressive man of God as Benjamin. The exact details of the meeting between these two parties remain unknown. The meeting was however conducted with a dignity which was not witnessed during the Asian battles. At the end of the conference, 'Amr restored to Benjamin all the rights that he had been denied by the Byzantines, and recognized him as the sole representative of the Egyptian people. Benjamin for his part publicly prayed for 'Amr and addressed him with admiration. Benjamin worked to restore the Coptic church by renewing some of the policies which had been put in place by his predecessor
Pope Damian of Alexandria. He also established amicable relations with 'Amr and the conquerors of Egypt. The Christian population of Egypt, however, remained divided between the Copts, Melkites, and other groups after the Arab conquest. Benjamin did however eventually prove successful in restoring a degree of unity to his fragmented population. Several Copts who had fled to the Libyan
Pentapolis returned. A number of those who had left the Coptic church under duress for the Melkite church during the occupation, including the bishops Cyrus of Nikiou and Victor of Phiom, returned to the fold. He also exercised his new legal and judicial functions, even in accord with the Byzantine legal system, to the satisfaction of the new Islamic authorities. Benjamin engaged in pontifical visitations to the dioceses and monasteries of the church, restoring properties wherever necessary. One of his more remarkable feats during this period was the recovery of the head of
Saint Mark, which the Melkites had intended to try to smuggle back to Byzantium. The head was probably left in the sanctuary of the
Monastery of Saint Macarius the Great in 645 or 647. Benjamin at the time also issued his canons to the monks of Saint Macarius. Benjamin helped guide and comfort the Coptic community during the early days of Islamic rule. 'Amr's successor, 'Abdallah ibn Sa'd ibn Abī-al-Sarḥ ibn al-Ḥārith al-"Āmirī, demanded large amounts of money from the native Egyptian people whose resources were depleted. Benjamin's effort and intercession brought comfort to oppressed Copts. Benjamin spent the last two years of his life encumbered by severe illness. After enduring a prolonged period of great suffering, he died on 3 January 661. ==Veneration==