- islam and Christianity - interactions and dialogue (the influence of Biblical demonology on the Qur’anic concepts of Satan in the context of the interaction of Ancient religions,[79] apocryphal tradition in the Quranic demonology,[80] Muslim tradition in the background of the Christian-Islamic acculturation from the 7th to the 10th centuries, the origin, history and meaning of the New Testament borrowings in the hadiths,[81] the interaction between the Qur’an and pre-Islamic Polytheistic and Christian beliefs,[82] the Old and New Testament elements in the Qur’an,[83] Christian influences on some Muslim interpretations of al-ʿArāf (‘the Muslim purgatory’)[84] and early Christian (Patristic) elements in the Qur'an,[85] the differences between Islam and Christianity.[86]