﴿ لِّيَجْعَلَ مَا يُلْقِى ٱلشَّيْطَٰنُ فِتْنَةًۭ لِّلَّذِينَ فِى قُلُوبِهِم مَّرَضٌۭ وَٱلْقَاسِيَةِ قُلُوبُهُمْ ۗ وَإِنَّ ٱلظَّٰلِمِينَ لَفِى شِقَاقٍۭ بَعِيدٍۢ ﴾

“[And He allows doubts to arise] so that He might cause whatever aspersion Satan may cast [against His prophets] to become a trial for all in whose hearts is disease and all whose hearts are hardened: for, verily, all who are [thus] sinning [against themselves] are most deeply in the wrong.”

It invariably happens that when one proclaims the divine Truth, whether he is a prophet or not, his opponents bring up various types of irrelevant points with a view to casting doubt on the truth of the message. Such points are always baseless. However, when they are raised, the preacher finds the opportunity to clarify his message and make it more cogent and well-established. This enhances the faith of sincere believers. Thereafter, their bonds with God become still stronger. But for those who are devoid of sincere understanding, these baseless objections become a source of trial for them. They are misled by them and move away from the Truth. ‘God will surely guide the faithful to a straight path’ means that those who are really sincere in their faith are not affected by false propaganda. They are never misled by the magic of false words. Their faith gives them deep insight into things, so that they are not carried away by outward appearances.