You are reading a tafsir for the group of verses 23:37 to 23:41
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إِنْ هِيَ إِلَّا حَيَاتُنَا الدُّنْيَا نَمُوتُ وَنَحْيَا وَمَا نَحْنُ بِمَبْعُوثِينَ

There is nothing but our worldly life. We die and we live and we are not to be raised again. - 23:37

This is the argument which the unbelievers advance when denying belief in the Day of Judgment. Those who deny it publicly are confirmed infidels, but it is very unfortunate that many Muslims also act in a manner that the same denial can be felt from their deeds and actions. They seem to be totally oblivious of the coming in of the Hereafter. May Allah Ta'ala grant them faith to release themselves from the clutches of this belief of theirs.