If you look at the Qur'an with the eyes of a sound heart, you will see that its six aspects are so brilliant and transparent that no darkness, no misguidance, no doubt or suspicion, no trickery could enter it or find a fissure through which to enter and violate its purity. For above it is the stamp of miraculousness; beneath it, proof and evidence; behind it, its point of support, pure dominical revelation; before it, the happiness of this world and the next; on its right, questioning the reason and ensuring its confirmation; on its left, calling on the conscience to witness and securing its submission; within it is self-evidently the pure guidance of the Most Merciful; its outside observedly consists of the lights of belief; and its fruits, with all certainty the purified and veracious scholars and saints, who are adorned with all the human perfections and attainments. If you fasten your ear to the breast of that tongue of the Unseen, you will hear from afar a most familiar and convincing, an infinitely serious and elevated heavenly voice equipped with proof which repeats "There is no god but God." It states this so certainly it is at the degree of 'absolute certainty', and illuminates you with a 'knowledge of certainty' resembling 'vision of certainty.'
In Short: Both God's Most Noble Messenger (Peace and blessings be upon him) and the Most Decisive Criterion of Truth and Falsehood were suns. One, the tongue of the Manifest World, pointing with the fingers of Islam and Messengership and confirmed by all the prophets and purified ones supported by a thousand miracles, demonstrated this truth with all his strength...
And the other, like the tongue of the World of the Unseen, indicating with the fingers of right and guidance under the confirmation of all the creational signs in the universe within forty aspects of miraculousness, demonstrates the same truth with all seriousness. Is that truth then not clearer than the sun and more brilliant than sunlight?
Oh, obdurate little man sunk in misguidance!36 How can you oppose these suns with the lamp of your head, dimmer than a fire-fly? How can you show disdain for them? Are you trying to extinguish them by puffing? Pooh to your denying mind! How can you deny the words and claims which those two tongues of the Manifest and Unseen Worlds speak in the name of the Sustainer of all the worlds and Owner of the universe; which they speak on His behalf? Oh, you wretch, lower and more impotent than a fly! Who are you that you attempt to give the lie to the universe's Glorious Owner?
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36. This is addressing someone who was trying to abolish the Qur'an.