O Beloved! Burn every leaf of the tree. Only deserts, spread deserts, O Beloved!

This couplet expresses a profound sense of despair or absolute devotion. The poet asks their beloved to burn every leaf of every tree, and then to spread only desert everywhere. It's a powerful image suggesting that without the beloved, all beauty and life, represented by trees and leaves, are meaningless and should be reduced to barrenness. The world becomes a desolate landscape reflecting the lover's inner state of longing or emptiness when separated from their sweetheart. It emphasizes that only the beloved matters, and everything else can be destroyed.