وَيَوْمَ يَحْشُرُهُمْ كَأَن لَّمْ يَلْبَثُوا إِلَّا سَاعَةً مِّنَ النَّهَارِ يَتَعَارَفُونَ بَيْنَهُمْ ۚ قَدْ خَسِرَ الَّذِينَ كَذَّبُوا بِلِقَاءِ اللَّهِ وَمَا كَانُوا مُهْتَدِينَ (45)
(10:45) (But today they are oblivious of everything except enjoyment of worldly life.) And on the Day when He will muster all men together, they will feel as though they had been in the world no more than an hour of the day to get acquainted with one another. *53 (It will then become evident that) those who called the lie to meeting with Allah *54 were utter losers and were not rightly-directed. underlies this sharp remark is the faint hope that perhaps such people would be shaken out of their slumber.
*53). A time will come when such people will, on the one hand, come face to face with the infinite life of the Hereafter, and on the other, they will took back at their past worldly life and realize how puny it was as compared to the life ahead. It is then that they will comprehend what folly they have committed by ruining their eternal future for the sake of ephemeral pleasures and benefits in this worldly life.
*54). This refers to the unbelievers' rejection that a time will come when everyone will have to stand before God for His judgement.