Verses 4 to 10 of surah al-Layl of the Quran state the divine law governing man’s guidance and his going astray which appears in diverse formulations in various contexts of the Quran.

Verily your efforts are differently oriented. Whoever gives in charity and does his duty to God in fear and reverence and believes in al-Husna, We shall facilitate the path of ease (Yusra) for him. And whoever is greedy and miserly and superciliously careless and belies al-Husna, We shall facilitate for him the path of misery (’Usra).  

The question of right guidance and its opposite is related here to........

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