So is one whose breast Allah has expanded to [accept] Islam and he is upon a light from his Lord [like one whose heart rejects it]? Then woe to those whose hearts are hardened against the remembrance of Allah . Those are in manifest error.
Chapter 22 Az-Zumar : Verse 22
The People of Truth and the People of Misguidance are not Equal
(Is he whose breast Allah has opened to Islam, so that he is in light from his Lord) means, is this person equal to the one who is hard-hearted and far from the truth This is like the Ayah:
(Is he who was dead and We gave him life and set for him a light (i.e. Belief) whereby he can walk amongst men — like him who is in the darkness (i.e., disbelief) from which he can never come out) (6:122) Allah says:
(So, woe to those whose hearts are hardened against remembrance of Allah!) meaning, they do not become soft when Allah is mentioned, and they do not feel humility or fear, and they do not understand.
(They are in plain error!).