the Praiseworthy (Hamid)...
the Praiseworthy (Hamid), the Clement (Halim), the Living (Hayy), the Truth (Haqq), the Wise (Hakim), the Arbitrator (Hakim), the Protector (Hafid), the Guardian (Hafid), the Ruler (Malik), the Glorious (Majid), the Honorable (Majid), the Beginner (Mubdi’), the Returner (Mu’id), the Exalted (Mu’izz), the Vigilant (Muhaymin). It is also said that Ha Mim is an oath by Divine Clemency and Sovereignty, viz.
I swear by My Clemency and Sovereignty that I shall not chastise those sincerely uttering ‘There is no god save Allah.’ Some say that Ha and Mim are the two middle letters al-Rahman (“the Merciful”) and the name of Muhammad (S) alluding to the secret known by God Almighty and his Friend, Muhammad.
There are other justifications for these two letters; however, since the letters of alphabet in the openings of a number of Qur’anic Chapters are, as it is well known in Islamic sources, among ambiguous Verses (mutashabihat) whose knowledge is with God Almighty and “those firmly rooted in knowledge” (rasikhun fi al-’ilm).
The word tanzil is an infinitive used ad hoc as a past participle denoting an oath regarding the revelation of the Qur’an by God, the Omnipotent, the Dominant, the Wise, and the Beneficent through Whose Everlasting Will has established everything in order out of Wisdom such that the system of creation is flawless.
According to exegets, the following Verse is substantiated by the fact that when theoretical sciences may not be proved through the five senses, i.e., any matter beyond the domain of the senses should be proven through either apriori demonstration, viz. from cause to effect, or aposteriori demonstration, viz. from effect to cause. Since Divine Existence is Supernatural, i.e., beyond perception, unintelligible, and without cause, it is the cause of causes not necessitating apriori demonstration.
As a consequence, His Existence maybe proved merely through aposteriori demonstration, viz. the perceiver should become aware of and attain certitude from effect to cause and believe in His Attributes of Glory and Beauty. Therefore, many a Qur’anic Verse prove the Existence of the Creator and attainment of certitude through the existence of the heavens and the earth.