Truth and wisdom require that the heavens have inhabitants appropriate to them as the earth has. According to the Shari‘a, those various beings are called angels and spirit beings. Reality requires it to be thus, for despite its small size and insignificance, the earth being filled with living and conscious beings, then emptied from time to time and once again repopulated suggests, indeed makes it clear, that the heavens too, in which are magnificent constellations and are like adorned palaces, should be filled with conscious and percipient creatures. Like men and jinn, those creatures are spectators of the palace of the universe, the observers of the book of creation, and the heralds of the sovereignty of dominicality. For the universe is arrayed and embellished with innumerable adornments, decorations, and ornaments, and self-evidently requires the thoughtful gazes of those who will appreciate it and wonder at it. Certainly, beauty requires a lover and sustenance is given to the hungry. However, man and jinn are able to perform only a millionth of this endless duty, this grand viewing, this extensive worship. That is to say, endless sorts of angels and spirit beings are necessary to perform these endless duties and diverse worship.

The Creator, Who continuously creates subtle life and luminous percipient beings from dense earth and turbid water, surely also creates conscious beings suitable for spirit and life, from those seas of light and even from the oceans of darkness. And He creates them in great abundance.

(The First Step From The Fifteenth Word - Risale-i Nur Collection)

There were two men, one rustic and uncouth, the other civilized and intelligent, who made friends and went to a splendid city like Istanbul. In a distant corner of that civilized and magnificent city they came across a dirty, wretched little building, a factory. They looked and saw that the strange factory was full of miserable, impoverished men working. All around the building were beings with spirits and animate beings, but their means of livelihood and conditions of life were such that some were herbivorous, they lived only on plants, while others were piscivorous, they ate nothing but fish.