How can I become a master scholar of the Qur'an and Sunnah, and a student of other religions, with the aim of conveying the message of Islam to the world?

For da'wah (inviting to Islam), the da'i (preacher) must embody Islam in his character and conduct to be a good role model, and invite others through his actions before his words.

He must build a scientific foundation of knowledge about Islam to understand his religion and its rulings, and to compare it with other religions.

Among the useful books is: "Islam: Its Reality, Laws, Beliefs, and Systems" by Muhammad ibn Ibrahim Al-Hamad.

Books on comparative religions vary depending on the religion, and many of them relate to Christianity.

Among the older books are: "The Correct Answer to Those Who Changed the Religion of Christ" by Ibn Taymiyyah, and "Guidance for the Perplexed in Answering Jews and Christians" by Ibn al-Qayyim.

Among contemporary books is: "Izhar al-Haqq" (The Manifestation of Truth) by Muhammad Rahmatullah al-Hindi.

It is recommended to read the lecture "Introduction to the Study of Religions" by Dr. Sultan Al-Omairi.