The Night and Day are Signs of the Great Power of Allah

Allah reminds us of the great signs that He created, including the alternation of the night and day, so that people may rest at night, and go out and earn a living, do their work, and travel during the day, and so that they may know the number of days, weeks, months and years, so they will know the appointed times for paying debts, doing acts of worship, dealing with transactions, paying rents and so on. Allah says:

لِتَبْتَغُواْ فَضْلاً مِّن رَّبِّكُمْ

Commentary

In the verses cited above, first it was declared that the alternation of night and day was a sign of the most perfect power of Allah Ta` ala. Then it was said that there was great wisdom in the making of the night dark and the day, bright. As for the wise consideration behind the making of the night dark, it was not mentioned at this place. It has, however, been mentioned in other verses that the darkness of the night is appropriate and conducive to sleep and rest. The divine arrangement is such that humans and animals go to sleep in the darkness of that very night. In fact, the whole world sleeps simultaneously in harmony with its night. Had different people been scheduled to sleep at different timings, the noises made by those awake and those working at jobs would have turned the sleep of the sleeping into a nightmare.