Abbas - Tanwîr al-Miqbâs min Tafsîr Ibn ‘Abbâs
(This is of the tidings of the Unseen) this is of the news of what has been hidden from you (which We inspire in thee) with which We sent Gabriel to you, O Muhammad, about the news of past nations. (Thou thyself knewest it not) i.e. you knew not the news of these past nations, (nor did thy folk (know it) before this) before the revelation of the Qur'an. (Then have patience) O Muhammad in the face of their denial and harm. (Lo! the sequel) the end result: victory and Paradise (is for those who ward off (evil)) ward off disbelief, idolatry and indecencies.
Those, that is, these verses, containing [stories such as] the story of Noah, are of the tidings of the Unseen, [of] the tales of that which was hidden from you, which We inspire in you, O Muhammad (s). You yourself did not know it, nor did your people [know it] before this, Qur’ān. So be patient, in conveying [the Message] and in [enduring] your people’s hurt, as Noah endured. Truly the, praiseworthy, sequel is for those who are God-fearing.
(neither you nor your people knew it before this.) This means that neither you (Muhammad ) nor anyone of your people, have any knowledge of this. This is so that no one who rejects you can say that you learned it from him. Rather, it was Allah Who informed you of it in conformity with the true situation (of the story), just as the Books of the Prophets who were before you testify to. Therefore, you should be patient with the rejection of your people and their harming you. For verily, We shall help you and surround you with Our aid. Then, We will make the (good) end for you and those who follow you in this life and the Hereafter. This is what We did with the Messengers when We helped them against their enemies.
إِنَّا لَنَنصُرُ رُسُلَنَا وَالَّذِينَ ءَامَنُواْ
(Verily, We will indeed make victorious Our Messengers and those who believe.) Allah also said,
(And, verily, Our Word has gone forth of old for Our servants, the Messengers, that they verily, would be made triumphant.) 37:171-172 Then, Allah says,
فَاصْبِرْ إِنَّ الْعَـقِبَةَ لِلْمُتَّقِينَ
(So be patient. Surely, the (good) end is for those who have Taqwa.)
Maududi - Sayyid Abul Ala Maududi - Tafhim al-Qur'an
That is, "You and your companions will come out successful at the end of the conflict just as Prophet Noah and his companions did. For this is the Divine Law that those who exert for the right cause, avoiding erroneous ways for fear of Allah, should come out successful in the end, even though they should meet with failures in the beginning of the conflict at the hands of the enemies of the truth. Therefore you should patiently bear the afflictions which you are suffering and stand steadfast against the obstacles you are encountering in the way, and you should not be in the least disheartened by the painful and superficial successes of your enemies. If you practice fortitude, you will come out successful in the end like Noah and his companions.