تِلْكَ ٱلْقُرَىٰ نَقُصُّ عَلَيْكَ مِنْ أَنۢبَآئِهَا ۚ وَلَقَدْ جَآءَتْهُمْ رُسُلُهُم بِٱلْبَيِّنَـٰتِ فَمَا كَانُوا۟ لِيُؤْمِنُوا۟ بِمَا كَذَّبُوا۟ مِن قَبْلُ ۚ كَذَٰلِكَ يَطْبَعُ ٱللَّهُ عَلَىٰ قُلُوبِ ٱلْكَـٰفِرِينَ Qur’an Al-A'raf (7:101)Tilka alqura naqussu AAalayka min anbaiha walaqad jaathum rusuluhum bialbayyinati fama kanoo liyuminoo bima kaththaboo min qablu kathalika yatbaAAu Allahu AAala quloobi alkafireena
Lit., "to which they had given the lie aforetime": an allusion to the instinctive unwillingness of most people to give up the notions - positive or negative - to which they are accustomed.
Those who have heard the Message and rejected it find it more difficult afterwards to retrace their steps. Evil has blocked the channels of Allah's grace to them. It begins with their breaking their Covenant with Allah; with each step afterwards they fall deeper and deeper into the mire.