What is the wisdom behind the association of denying progeny to Allah and affirming His Oneness with the name "Ar-Rahman" (The Most Merciful) in numerous Quranic verses, and why were terms like "Al-Jabbar" (The Compeller) or "Al-Qawi" (The Most Strong) not used to intimidate disbelievers?

The reasons for mentioning the name "Al-Rahman" in the Holy Qur'an are summarized as follows:

1. In Surat Maryam: To provoke the polytheists who denied this name. To emphasize that the attribute of Al-Rahman contradicts the idea of taking a son. To draw attention to the vastness of Allah's mercy and His forbearance with the polytheists. To demonstrate that His mercy rejects what they attributed to Him, and necessitates that everyone be His servants. Its four repetitions confirm that the attribute of Al-Rahman contradicts the claim of a son, and that every existing being is in need of His mercy.

2. In Surat Ya-Sin: "Al-Rahman" was mentioned instead of "Allah" because the context speaks of Allah's mercy and His favor with which He created man, and Al-Rahman is a name indicating tenderness and mercy.

3. In Surat Az-Zukhruf: The frequent mention of "Al-Rahman" (seven times) is an affirmation of the call to Allah and a clarification of His vast mercy. It addresses the polytheists by the name "Al-Rahman" because it was a name they knew, to indicate that the God they are called to worship is Al-Rahman, who has no son. The surah came with a gentle and conciliatory tone towards the polytheists, so mentioning "Al-Rahman" reminds one of mercy and calls for peace and conciliation.