The Struggle: The first line represents Anxiety/Worry (تشویش), which makes you feel trapped in a difficult situation, convincing you that things will never get better (the "darkness").
The Comfort: The second line represents Hope (امید), reminding you that no matter how long the night feels, a new dawn and better days are always right around the corner.
It is a poetic reminder of the constant tug-of-war between fear and optimism inside our minds.
