And thus do We recompense he who transgressed and did not believe in the signs of his Lord. And the punishment of the Hereafter is more severe and more enduring.
(For them is a torment in the life of this world, and certainly, harder is the torment of the Hereafter. And they have no defender or protector against Allah.) 13:34 Therefore Allah said,
وَلَعَذَابُ الاٌّخِرَةِ أَشَدُّ وَأَبْقَى
(and the torment of the Hereafter is far more severe and more lasting.) meaning: a more grievous and more painful penalty than of this world they will remain therein, they will abide forever in such torment. Allah's Messenger ﷺ said to both husband and wife who took an oath, when the husband accused his wife of committing illegal sexual intercourse:
وَمَنْ أَعْرَضَ عَن ذِكْرِي (And whoever turns away from My message - 20:124.) Here the word can refer both to the Qur'an and the Holy Prophet ﷺ as has been mentioned in other verses ذِكْرًا ﴿10﴾ رَّسُولًا (65:10). In both cases the meaning would be that if anyone fails in his duty to recite the Qur’ an or to comply with its commands, or if he fails to submit to the authority of the Holy Prophet then as punishment he would be condemned to a harsh and rigorous life in this world and would be raised blind on the Day of Resurrection.
The truth about the life of infidels and evil-doers being harsh in this world
God settled Satan as well as Adam on the earth and gave due warning in the very beginning that clashes of interest between the two would go on till Doomsday. Satan would make every possible effort to mislead mankind, therefore, people should make it a point to treat him as their greatest enemy and try to stay far away from his inducements. To give further guidance to man, God periodically sent him His messengers, or prophets, who instructed him in the reality of life in a language which was clearly intelligible to him. Now, the success or failure of man depends on his own acceptance or rejection of the Prophet’s guidance. One who accepts this guidance will once again be ushered into the comfortable life of paradise, whereas the life of one who fails to accept it will be a very severe one, from which he will never be able to escape. Those who turn away from God’s guidance will be reduced in the Hereafter to blindness, being deprived of both the eyes. The reason for this is that such people are given eyes in the world in order to be able to see and recognise God’s signs. But they live in such a manner that, when they encounter God’s signs, they fail to recognise them. Thus, they prove that, in spite of having eyes, they are really blind. So God will ask on that Day, what use it had been to give eyes to those who were determined to be blind.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.