Analysis:

This quatrain by Saadi Shirazi beautifully captures the pain of unrequited love and the longing for a beloved. Let's break down the meaning of each line:

Line 1: "The long nights keep me awake more": This line suggests that the poet is unable to sleep due to their thoughts of the beloved. The nights seem endless, and the absence of the beloved is causing them great distress.

Line 2: "Near dawn, I turn towards my pillow": This line indicates that the poet eventually tries to sleep, but their efforts are futile. They turn towards their pillow, a symbol of rest and peace, but their mind is too occupied with thoughts of the beloved.

Line 3: "I imagine that my eyes, without seeing my beloved, can sleep": The poet wishes that their eyes could close and forget about the beloved, allowing them to sleep peacefully. However, they realize that this is just a wishful thought.

Line 4: "I imagine it's a dream": The final line suggests that the poet is so consumed by their longing that they start to question reality. They wonder if their feelings are just a dream, a temporary escape from the pain of unrequited love.

Themes:

Unrequited love: The central theme is the pain and suffering caused by unrequited love.
Insomnia: The inability to sleep is a common symptom of emotional distress, and it serves as a metaphor for the poet's restless heart.
Longing: The poet expresses a deep longing for their beloved.
Escapism: The poet seeks solace in dreams, hoping to find peace and forget about their pain.

This quatrain is a poignant expression of human emotion. It captures the universal experience of longing for someone who is unattainable. The poet's vivid imagery and heartfelt expression make this a timeless and relatable poem.