Surah 10. Yunus, Ayah 67

See {14:32-33} and the corresponding note [46]; for the specific significance, in this context of the reference to "day" and "night", see note [77] on 27:86 , which belongs to a somewhat earlier revelation than the present surah.

Our physical life-and our higher life in so far as it is linked with the physical-is sustained by the alternation of rest and activity, and the fit environment for this alternation is the succession of Nights and Days in our physical world. The Day makes the things "visible to us-" a beautiful symbol, not only of the physical work for which we go about by day, but of the higher activities which are fitly associated with seeing, perception and enquiry. Intuition (insight) is a little out of that circle because that may come by night, when our other faculties are resting.