The Criterion
أَلَمْ تَرَ إِلَىٰ رَبِّكَ كَيْفَ مَدَّ ٱلظِّلَّ وَلَوْ شَآءَ لَجَعَلَهُۥ سَاكِنًا ثُمَّ جَعَلْنَا ٱلشَّمْسَ عَلَيْهِ دَلِيلًا
Have you not considered your Lord - how He extends the shadow, and if He willed, He could have made it stationary? Then We made the sun for it an indication.
Nearby ayahs help place verse 25:45 in sequence and meaning.
أَرَءَيْتَ مَنِ ٱتَّخَذَ إِلَـٰهَهُۥ هَوَىٰهُ أَفَأَنتَ تَكُونُ عَلَيْهِ وَكِيلًا
Have you seen the one who takes as his god his own desire? Then would you be responsible for him?
أَمْ تَحْسَبُ أَنَّ أَكْثَرَهُمْ يَسْمَعُونَ أَوْ يَعْقِلُونَ ۚ إِنْ هُمْ إِلَّا كَٱلْأَنْعَـٰمِ ۖ بَلْ هُمْ أَضَلُّ سَبِيلًا
Or do you think that most of them hear or reason? They are not except like livestock. Rather, they are [even] more astray in [their] way.
ثُمَّ قَبَضْنَـٰهُ إِلَيْنَا قَبْضًا يَسِيرًا
Then We hold it in hand for a brief grasp.
وَهُوَ ٱلَّذِى جَعَلَ لَكُمُ ٱلَّيْلَ لِبَاسًا وَٱلنَّوْمَ سُبَاتًا وَجَعَلَ ٱلنَّهَارَ نُشُورًا
And it is He who has made the night for you as clothing and sleep [a means for] rest and has made the day a resurrection.