Divine decree and the hardening of hearts

أَسْبَـٰبَ ٱلسَّمَـٰوَٰتِ فَأَطَّلِعَ إِلَىٰٓ إِلَـٰهِ مُوسَىٰ وَإِنِّى لَأَظُنُّهُۥ كَـٰذِبًا ۚ وَكَذَٰلِكَ زُيِّنَ لِفِرْعَوْنَ سُوٓءُ عَمَلِهِۦ وَصُدَّ عَنِ ٱلسَّبِيلِ ۚ وَمَا كَيْدُ فِرْعَوْنَ إِلَّا فِى تَبَابٍ

The ways into the heavens - so that I may look at the deity of Moses; but indeed, I think he is a liar." And thus was made attractive to Pharaoh the evil of his deed, and he was averted from the [right] way. And the plan of Pharaoh was not except in ruin.