Complete Tafseer from Agha Mahdi Pooya regarding Surah Ar-Ra’d – Ayat 7
The Qur’an treats the miracles as subordinate to the moral and spiritual evidences and signs demonstrated by the Holy Prophet, who was sent as a warner.
Refer to the commentary of al Baqarah: 118 "And for every people there is a guide."(2:118)
Tha’labi in his Tafseer relates on the authority of Ibn Abbas that when this verse was revealed the Holy Prophet said: "I am the warner and Ali is the guide. O Ali, through you those who are guided will receive true guidance."
This tradition has also been reported and confirmed by Ibn Marduwayh, Ibn Hatim, Tabarani, Ibn Asakir, Suyuti, Ahmad bin Hambal, Fakhruddin Razi and Abu Nu’aym.
Imam Muhammad bin Ali al Baqir also said that "the warner" means the Holy Prophet and "the guide" means Ali and added "the authority to guide continues among us". This verse also points to the continued existence of a "guide", namely al Mahdi al Qa’im (refer to the commentary of al Bara’at, 9:32 and 33); and for "the true guides" refer to the commentary of Yunus, 10:35. The Holy Prophet is a warner for all people in all times, so the Imam (guide) in his progeny is also for all people in every age.
The enemies of the Ahl ul Bayt try to conceal their merits, and deny their divine rights, but Allah's plan is always executed and His will invariably takes effect:
They desire to put out the light of Allah with their mouths, but Allah wills to perfect His light, however the unbelievers may dislike it. (As-Saff, 61: 8)
Allah had willed and thoroughly purified the Ahl ul Bayt (Al-Ahzab, 33:33) and established them as the only truthfuls at the time of mubahilah (Ali Imran, 3:61).