ثُمَّ ارْجِعِ الْبَصَرَ كَرَّتَيْنِ يَنقَلِبْ إِلَيْكَ الْبَصَرُ خَاسِئًا وَهُوَ حَسِيرٌ
Look again, once more. Your look will return to you humbled and weary.
Agha Ali Puya Commentary
Commentary on Quran 67:4
[Pooya/Ali Commentary 67:4] Islam does not impose regimentation but invites man to observe and study the external or visible world again and again, and as minutely as his faculties allow him. However closely he observes it, he shall find no flaw in it. It is his own faculties that he will find incompetent to go beyond a certain compass.