Badges mark quoted or attributed material (Qur'an, hadith, another author, an opposing view). Unbadged passages are Maulana Wahiduddin Khan's own words.
The Islamic man is one who, in consonance with his spiritual development, experiences constant intellectual activity which results in the most intense brainstorming. The intellectual awakening, or intellectual development of an Islamic man is so extensive that he becomes cerebrally activated to the highest possible extent. What is that external factor which stimulates this kind of intellectual activity in the Islamic man? It is dawah work.
According to the Quran, the Prophet of Islam is the final Prophet. Although no Prophet is going to come after him, the mission of the Prophet must continue. The Ummah of the Prophet, charged with carrying on this mission for posterity, is thus addressed in the Quran: And thus We made you an intermediary nation so that you might bear witness against the people and the Prophet might testify against you. (2:143)
A commentator of the Quran has interpreted this as follows: Muslims are intermediary between the Prophet and the nations of the world (Al-Tabari). In conformance with this, dawah work is obligatory for the Muslim Ummah. It is their essential duty to receive the divine message of the Prophet and convey it to the rest of humanity. It is not simply an act of annunciation. It is the most important struggle. Because of this the Quran says: Do with them the great jihad by the help of the Quran (25:52).
The Quran is a book, not a weapon. “Great jihad with the Quran” means a great religious endeavour; da’wah work is thus a great ideological struggle. It is a supreme intellectual effort which stretches to the utmost the mental capacity of the human being.