Allah is the Guardian of the believers—He brings them out of darkness and into light. As for the disbelievers, their guardians are false gods who lead them out of light and into darkness. It is they who will be the residents of the Fire. They will be there forever.
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This verse also tells us that faith ('Iman ایمان ) is the greatest blessing
and disbelief (kufr کفر ) is the greatest misfortune, and that there is darkness in friendship with those who disbelieve (kuffar کُفار ).