This is an oath, if you only knew, that is awesome. These uncountable decillions of heavenly bodies maintain their orbits in a divinely controlled precision. The more we learn, the more we realize how awesome this oath is. This is an honorable Quran. In a protected book.
None can grasp it except the sincere.
A revelation from the Lord of the universe. We are closer to it than you are, but you do not see. This is the absolute truth. The insincere who are not satisfied with the Quran alone are divinely prevented from understanding the Quran. Consequently, they cannot understand this verse.