Analysis:

This quatrain by Saadi Shirazi is a poignant expression of emotional turmoil and the complexities of love. Let's break down its meaning:

Internal Conflict: The poet is torn between the desire for peace and the compulsion to pursue a love that causes them pain.
The Pain of Love: The image of being caught in a "snare" suggests that the poet feels trapped by their love, unable to escape the pain it causes.
The Conflict of Reason and Emotion: The advice to "not go" represents the voice of reason, warning against further pain. However, the poet's emotions overcome their reason, compelling them to continue the pursuit.
The Inevitability of Suffering: The line "for you will spill your own blood" suggests that the poet is aware of the self-destructive nature of their pursuit, yet they are unable to stop.

Themes:

Unrequited love: The poet seems to be in love with someone who is not reciprocating their feelings.
Emotional turmoil: The poet is experiencing a great deal of emotional pain and confusion.
The conflict between reason and emotion: The poet is torn between their head and their heart.
The inevitability of suffering: The poet seems to believe that their suffering is inevitable.

Deeper Meaning:

This quatrain captures the universal human experience of unrequited love and the emotional turmoil that comes with it. The poet's sense of helplessness and the conflict between their reason and their emotions resonate with many people.

This quatrain is a powerful expression of the human condition. It reminds us of the enduring power of love, even when it causes pain.