ومنهم من يستمع إليك وجعلنا على قلوبهم أكنة أن يفقهوه وفي آذانهم (6:25) بالانجليزي

(6:25) And of them there are some who appear to pay heed to you, but upon their hearts We have laid coverings so they understand it not; and in their ears, heaviness (so they hear not). *17 Even if they were to witness every sign, they would still not believe in it so much so that when they come to you, they dispute with you, those who disbelieve contend: 'This is nothing but fables of the ancient times.' *18

Tafseer Abu-al-A'la Maududi

Page 130 English Traditional

*17). It is noteworthy that God attributes to Himself all that happens in the world as a result of the laws of nature. Since these laws were made by God Himself, the effects which result from their operation are also ultimately due to the will and permission of God. The refusal on the part of unbelievers to heed the call of the Truth even when it is clear and audible stems from their obstinacy, prejudice, mental rigidity and inertia. It is a law of nature that when a man is not prepared to rise above prejudice in his quest for the Truth, his heart closes to every truth which is opposed to his desires. We can describe this condition by saying that the heart of that person has become sealed and when God describes it He does so by saying that He had sealed the heart of the person concerned. The explanation of this Paradox is that whereas we describe merely an incident, God describes its ultimate cause.
*18). Whenever ignorant people are called to the Truth they are liable to say that there is nothing novel about it, that it is merely a repetition of things that have come down from the past, as if in their view every truth must be new, and whatever is old must of necessity be false, although Truth has always been one and the same and will remain so. All those who have come forward to lead people in the light of God-given knowledge have been preaching one and the same Truth from time immemorial, and all those who will benefit from this valuable source of human knowledge in the future are bound to repeat the same old truths. Novelties can be invented only by those who, being bereft of the light of Divine guidance, are incapable of perceiving the eternal Truth, preferring to weave altogether new ideas out of their imagination and to put them forward as truth.