Religious works have also been left incomplete, leading to debates about the possible missing content. Some theologians consider the Gospel of Mark, in its existing form, incomplete; the text after 16:8 is probably not original, thus creating speculation whether the author was arrested or died suddenly, or whether the end of the gospel could have broken away from the rest of the gospel as it was handed to the next person. The Sunni Islamic classic Qur'anic commentary, Mafatihu-l-Ghayb, better known as Tafseer Al-Kabeer (Tafsir al-Kabir (al-Razi)) by Fakhr al-Din al-Razi was left unfinished and it was finished by either Qadi Shahab-ud-deen bin Khaleel al-Khauli, of Damascus (died 639 AH) or Shaikh Najm-ud-deen Ahmad bin Al-Qamooli (died 777 AH) as mentioned in Kashf-az-Zunoon. The Masnavi, the most famous poem in Sunni Islamic Sufi poetry by Rumi was left unfinished and it was later finished by Mufti Ilahi Baksh Kandhlawi about five hundred years after the demise of Rumi. The Persian Bayán, a scripture from Bábism, was left unfinished when the Báb died. There have been some claims that the text has been completed by other people, though the Báb stated that it would be finished by whom God shall make manifest. St. Thomas Aquinas abandoned his great work the "Summa Theologica" in 1273, citing a mystical experience during Mass. Its arguments for the existence of God continue to exert influence in philosophy and Christian theology more than 700 years later.