Important Criterion
6:113 This is to let the minds of those who do not believe in the Hereafter listen to such fabrications, and accept them, and thus expose their real convictions.*
*6:113 The Quran provides criteria that tell us whether we truly believe in the Hereafter or merely give it lip service. These important criteria are stated here, and in 17:45-46 and 39:45. *6:113-115 Upholding any source beside the Quran reflects disbelief in the Quran (Appendix 18).
According to the Quran what is the criteria to tell if we believe in the Hereafter?
Disbelievers Cannot Understand Quran
17:45 When you read the Quran, we place between you and those who do not believe in the Hereafter an invisible barrier.