When we deviate from the right path we have been chosen to follow, that is where we lose control of the things, people or situations we once held so tight.
That is when we need a light. A light from the Allmighty so that we do not go astray any further. A light which takes us back to the purer life like the one we had when we first open our eyes on this world. To bring back to us the respect we have lost, the people we let go out of ego and the situations we worsened just because we did not want to agree with others out of jealosy and stubborness!
Thus we all need that light to bring back the honour to us, we have long lost.
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From @hinaimran