Five 10th century Arabic Christian treatises

Five 10th century Arabic Christian treatises originally published by Paul Sbath in "Vingt traités philosophiques et theologiques" (Cairo, 1929) are now online here:

http://www.tertullian.org/fathers/index.htm#Twenty_theological_and_philosophical_treatises

These new English translations are followed by a transcription of the Arabic. All are public domain; use them as you like.

15. Yahya ibn Adi - On the Truth of the Gospel by Way of Reasoning from Proofs
16. Yahya ibn Adi - On the Differences in the _Expressions in the Gospels and their Meanings
17. Yahya ibn Adi - On our saying "and became incarnate of the Holy Spirit and the Virgin Mary"
18. Abu al-Khayr ibn al-Tayyib - Refutation of the Muslims who accuse the Christians of Believing in Three Gods
19. Abu al-Faraj `Abdallah ibn al-Tayyib - On Knowledge and Miracles

Numbers 15-17 are by Yahya ibn `Adi. From Graf II 233-249: He was a Jacobite, born in 893 at Tikrit, went to Baghdad and studied in the philosophical school there. Died 13 August 974. A voluminous writer. Sbath pp. 168-171 contains a treatise on the truth of the Gospel, using syllogisms. p. 171f is another similar treatise; p. 172-175 on the credal statement, "He became flesh by the Holy Spirit of the Virgin Mary."

Number 18. Abu al-Khayr ibn al-Tayyib (Graf II 344-348) A Copt, writing between 1204 and 1245. Sbath p. 176-178 prints an extract only of his book "The medicine of understanding", 24 chapters against the attacks of Moslem polemicists.

Number 19. Abu al-Faraj ibn al-Tayyib (Graf II 160-176) An Iraqi Nestorian, philosopher, physician, monk and priest in the first half of the 11th century. Another voluminous writer, including massive biblical commentaries on the Psalms and Gospels. Sbath prints p.179f, a work on miracles and philosophy.

The site contains a large collection of public domain English translations of patristic literature, available here:

http://www.tertullian.org/fathers

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http://www.tertullian.org/fathers/all_the_fathers_on_cd.htm