'He enters' means He introduces and conceals by reduction and erasure 'the night into the day.' So when it has shortened after its length, and it has vanished after its distinctness and presence, then the light has filled the regions after that darkness. 'And He enters the day' which has illuminated the universe with its light and brightened it with its brilliance 'into the night' which had been absent in His knowledge. So when the darkness has enveloped the horizons, the length which was for it has become a reduction.

And since this shows the most concealed of things until it becomes in the utmost clarity, He followed it with knowledge of what is with people, the most concealed it can be, saying: 'And He is' meaning alone 'All-Knowing' meaning possessing profound knowledge 'of what is in the breasts' meaning what accompanies them, so it conceals it, and the whispers do not emerge from it over the span of days despite their numerous differences and changes, even if it is concealed from its possessors.