Say, "O mankind, the truth has come to you from your Lord, so whoever is guided is only guided for [the benefit of] his soul, and whoever goes astray only goes astray [in violation] against it. And I am not over you a manager."
(And I am not set over you as a guardian) This means, `I am not a guardian over you in order for you to become believers. I am only a warner to you and guidance belongs to Allah, the Exalted.' Concerning Allah's statement,
وَاتَّبِعْ مَا يُوحَى إِلَيْكَ وَاصْبِرْ
(And follow what has been revealed to you, and be patient) This means, `Adhere to that which Allah has revealed to you, and inspired you with, and be patient with the opposition that you meet from the people.'
حَتَّى يَحْكُمَ اللَّهُ
(until Allah gives judgment) This means, `Until Allah judges between you and them.'
وَهُوَ خَيْرُ الْحَـكِمِينَ
(And He is the best of judges. ) This means that He is the best of those who pass judgment, due to His Justice and His wisdom.
Ma'arif al-Qur'an
Mufti Muhammad ShafiOn ayahs 98–109
In the seventh verse (98), the heedless deniers of truth have been admonished for their failure to make the optimum use of the time of life allowed to them. There was still time for them to leave denial and contumacy. Otherwise, an ominous time was due to come when they will make Taubah but their Taubah will not be accepted. They will say that they believed but their belief will not be welcome. And that time will be the time when the punishment of the Hereafter will appear right before their eyes at the time of death. It was in this connection that an event relating to Sayyidna Yunus (علیہ السلام) and his people was mentioned - that has good counsels and great lessons in it.
Death testifies to the fact that man is completely powerless in this world. Death proves all those things false, on the strength of which man opts for the way of arrogance and denial of God. Death introduces man, on the one hand, to his helplessness and on the other to God’s majestic power. It shows that in this world there is nobody who has the power to grant benefits or inflict harm. If a man has a mind capable of learning lessons from events, then the event of death is enough to reform him. It makes a man a perfect worshipper of God. A time comes for every man when, helpless, he surrenders himself to death. Similarly, it is not within the power of any man, whether it concerns benefit or harm, to cause things to happen as he wants. He receives the desired benefit in any case; and remains safe from undesirable harm in any case. This state of affair shows that man is a powerless creature: he lives in a world where there is some Being who rules over him.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.