The book Why Did They Become Muslims consists of 3 sections. Section I is a book of Islam and Christianity. Information about Prophets, books, religions (Judaism, Christianity and Islam) is given, conditions of being a true Muslim are explained, the words of those filled with admiration for Islam and the lives of 42 people who being a member of other religions chose Islam are narrated. Section II is a book of the Qur’an-ı Karîm and the Torah and the Bibles as of Today. Information about today’s Torah and Bibles is given, errors in the Bible are explained; that the Qur’an-ı Karîm is the last and unchangeable book is explained scientifically. Besides, explained are miracles, virtues, moral practices and habits of Muhammad ´alayhissalâm. Section III is a book of Islam and Other Religions. That Islam is not a religion of savageness, that a true Muslim is not ignorant, that there can be no philosophy in Islam are explained along with explanations of primitive religions and celestial religions.
This work, Belief and Islam, originally was written in Persian under the title I’tiqâd-nâma by Hadrât Mawlânâ Khâlid al-Baghdâdî, a profound ‘âlim of Islam and a specialist in ma’ârif of tasawwuf. Hâji Faydullah Effendi of Kemah, a khalîfa of great walî Mavlânâ Mahmûd Sâhib, the brother of the author, translated the book into Turkish and named it Farâid-ul-fawâid which was printed in Istanbul in 1312 A.H.. Our bookstore had it translated again from the Persian original into Turkish and, some explanations and three chapters, published it with the title Imân ve Islâm in 1966. German, French and Arabic versions are also published by our bookstore. This book, explains five fundamentals of Islam, six fundamentals of îmân and the contemporary information about the matter and refutes those who are against Islam and those who are lâ-madbhabî.
The great walî, the treasure of Allâhu ta’lâlâ’s blessings, superior man in every respect, the master of unattainable knowledge, the light of right, truth and religion
MAWLÂNÂ DIYÂ’ AD-DÎN