Quran 39:29 · Az-Zumar

The Quran’s statements are in a language intelligible to man and within the sphere of his knowledge, so that nobody should have any difficulty in understanding them. Here, in symbolic language, it has been explained that the principle of the Unity of God as compared to polytheism is more rational and consistent with nature. Indeed, the functioning of the external universe is indicative of the fact that a single Will is operative in it. Had there been many intentions operative therein, the system of the universe could not have run so harmoniously. Moreover, man’s nature is also such that it prefers unity in loyalty. It is entirely against man’s nature to subscribe to different kinds of loyalties, as a result of which he is unable to do justice to any of them. All arguments and possibilities indicate that there is only one God, who is the Creator of man and who is worthy of being worshipped by him. In the present world, this fact is proclaimed through men like us. On the Day of Judgement, this will be declared by the Creator of the Universe Himself. At that time, denial of this fact will be impossible.