Al Baqarah

اللّهُ وَلِيُّ الَّذِينَ آمَنُواْ يُخْرِجُهُم مِّنَ الظُّلُمَاتِ إِلَى النُّوُرِ وَالَّذِينَ كَفَرُواْ أَوْلِيَآؤُهُمُ الطَّاغُوتُ يُخْرِجُونَهُم مِّنَ النُّورِ إِلَى الظُّلُمَاتِ أُوْلَـئِكَ أَصْحَابُ النَّارِ هُمْ فِيهَا خَالِدُونَ

257. "Allah is the Guardian of those who have faith; He brings them out of darkness into light; and those who reject faith, their guardians are false-deities, (taghut), who bring them out of light into darkness; they are the inhabitants of the Fire wherein shall they abide forever. "

With reference to the state of belief and disbelief, which was mentioned in the previous verse, here, in this verse, it distinguishes the situation of believers and disbelievers from the point of leader and guardian. It says:

So it is under the favour of this guardianship and leadership, that:

Then it adds:

It is for this reason that: