The Disbelievers will remain in Doubt and Confusion
Allah tells us that the disbelievers will remain in doubt concerning this Qur'an. This was the view of Ibn Jurayj and was the view favored by Ibn Jarir.
حَتَّى تَأْتِيَهُمُ السَّاعَةُ بَغْتَةً
(until the Hour comes suddenly upon them,) Mujahid said: "By surprise." Qatadah said:
بَغْتَةً
(suddenly) means, the command of Allah will catch the people unaware. Allah never seizes a people except when they are intoxicated with pride, enjoying a life of luxury, and they think that the punishment will never come upon them, but Allah does not punish anyone except the evildoers.
مِن رَّسُولٍ وَلَا نَبِيٍّ (any messenger and any prophet - 22:52) This shows that the words Rasul رَّسُولٍ and Nabi carry different meanings, though there is no consensus as to the precise nature of the difference. For our purpose it is enough to understand that Nabi نَبِيٍّ is a person whom Allah Ta’ ala designates with a mission to reform his people and who receives revelations from Him. He may receive a Scripture and a code of laws or he may be commanded to convey the message of an earlier Book and code of laws. Sayyidna Musa (علیہ السلام) and ` Isa' (علیہ السلام) belong to the first category, whereas Sayyidna Harun (علیہ السلام) ، who was directed to propagate the teachings of Torah and the Mosaic Laws, falls in the second category. On the other hand a Rasul رَّسُولٍ is a person who receives from Allah Ta’ ala a Scripture and a code of laws. Thus every رَّسُولٍ Rasul is necessarily a Nabi also, but every Nabi is not a Rasul. These distinctions are applicable to human beings only. That an angel who carries wahy from Allah Ta’ ala is also named as Rasul does not contradict this position. This subject has already been discussed in detail in Surah Maryam in the beginning of this volume.
It invariably happens that when one proclaims the divine Truth, whether he is a prophet or not, his opponents bring up various types of irrelevant points with a view to casting doubt on the truth of the message. Such points are always baseless. However, when they are raised, the preacher finds the opportunity to clarify his message and make it more cogent and well-established. This enhances the faith of sincere believers. Thereafter, their bonds with God become still stronger. But for those who are devoid of sincere understanding, these baseless objections become a source of trial for them. They are misled by them and move away from the Truth. ‘God will surely guide the faithful to a straight path’ means that those who are really sincere in their faith are not affected by false propaganda. They are never misled by the magic of false words. Their faith gives them deep insight into things, so that they are not carried away by outward appearances.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.