gave a eulogy which can be found in Baháʼí Proofs. Moojan Momen, a historian of Baháʼí studies, states that Abu'l-Faḍl possessed a critical mind, and had a complete devotion to the Baháʼí Faith. Momen states that Abu'l-Faḍl's writings "show a keen understanding of modern currents of thought remarkable in a man who only knew oriental languages." and was able to apply the Baháʼí teachings to a wide range of different issues. As an author Mírzá Abu'l-Faḍl wrote on a wide range of Baháʼí subjects, including extensive amounts of material about the proofs of Baháʼu'lláh's mission. He was consistently praised by the central figures of the Baháʼí Faith and Shoghi Effendi. His papers and letters include a wide range of presentations of the Baháʼí Faith for those of Christian and Jewish backgrounds, and his concepts in the presentation of the Baháʼí Faith continue to be important today. After his death, his papers, including several unfinished works, were taken to Ashqabat, where his nephew lived; many of these papers were, however, lost during the Russian Revolution. ʻAbdu'l-Bahá once wrote, referring to The Brilliant Proof: "His Honour Mírzá Abu'l-Faḍl has written a treatise answering the criticisms of a London preacher. Each one of you should have a copy. Read, memorize and reflect upon it. Then, when accusations and criticisms are advanced by those unfavourable to the Cause, you will be well armed." Publications Fara'id (The Peerless Gems): A book written in 1898 in reply to an attack on the Kitáb-i-Íqán and published in Cairo. Generally considered Mírzá Abu'l-Faḍl's greatest work, written in Persian, with occasional citations of Arabic statements. Al-Duraru'l-Bahiyyih (The Shining Pearls): Published in 1900, it is a collection of essays on the history of the Baháʼí Faith. Since it was written in Arabic, it was responsible for making the Baháʼís known in Egypt. It has been translated by Juan Cole as Miracles and Metaphors () Burhan-i-Lamiʻ (The Brilliant Proof): Published, along with an English translation, in Chicago in 1912, the paper responds to a Christian clergyman's questions. Republished as Sharh-i-Ayat-i-Mu'arrakhih (In Explanation of Massacre Verses that Prophesy Dates): Written in 1888, the work discusses the date of the prophecies concerning the coming of the Promised One in the scriptures of Islam, Christianity, Judaism, and Zoroastrianism. Risalih Ayyubiyyih (Treatise addressed to Ayyub): Written in 1887, concerning prophecies relating to the Promised One in the Torah. Faslu'l-Khitab (The Decisive Utterance): A large book