Allah is the Irresistible, Able to Bring Benefit and Protect from Harm
Allah states that He Alone brings benefit or harm, and that He does what He wills with His creatures, none can resist His judgment or prevent what He decrees,
(And if Allah touches you with harm, none can remove it but He, and if He touches you with good, then He is able to do all things.) Similarly, Allah said,
(Whatever mercy, Allah may grant to mankind, none can withhold it, and whatever He may withhold, none can grant it thereafter) 35:2. It is recorded in the Sahih that the Messenger of Allah ﷺ used to supplicate,
In verse 20, there is a refutation of the saying of those who had said that they had checked with the Jews and the Christians and none of them were ready to attest to his truth as a Messenger of Allah. About that it was said: الَّذِينَ آتَيْنَاهُمُ الْكِتَابَ يَعْرِفُونَهُ كَمَا يَعْرِفُونَ أَبْنَاءَهُمُ ; (That is, as for the Jews and Christians, they recognize Muhammad al-Mustafa as they would recognize their sons.
The reason is that there is, in the Torah and Injil, a full description of the physical features of the Holy Prophet ﷺ ، of his home city and then his post-emigration place of residence, and of his habits and morals and achievements - all this in such details that it leaves no room for doubt in the recognition of his identity. In fact, this is not limited to the mention of the Holy Prophet ﷺ the Torah and the Injil carry even the detailed description of his noble Sahabah as well. Therefore, there was no possibility that anyone who recited the Torah and the Injil and believed in them would be unable to recognize the Holy Prophet ﷺ .
In the on-going struggle between the proponents, on the one hand of Truth and on the other of falsehood, the only decisive factor is the Book of God. There is nobody who knows the full facts or has any real authority except God. So God, the only Being who is capable of settling this dispute, has given an arbiter to the people in the form of the Quran. Now, man has only one course open to him. If he is not aware of the veracity of the Quran, he should investigate and satisfy himself that it is the Book of God. When he comes to know that it is really the Book of God, he should necessarily be satisfied with whatever is advocated therein. One who is not in agreement with the decision of the Quran runs the risk of being forced to accept its verdict in the Hereafter after much degradation and punishment. The Quran has been revealed so that, before the arrival of the time of Judgement, people may be made aware of what awaits them. The Prophet Muhammad performed this task during his prophethood and the same work has to be continued by his followers (ummah) till Doomsday. The Quran tells us in advance how God is going to treat people in the eternal world of the Hereafter. Those who are assigned the task of delivering this message to the people will be free of the responsibility once they have fully conveyed the message; but those to whom it is delivered will be free in the eyes of God only when they have accepted it and reformed themselves accordingly. The missionary’s responsibility ends with his ‘preaching’, while that of the addressee ends only on his ‘fulfilling his religious obligations’.