Look at the sign of the scar of your longing that marks Wali's heart in his utter weakness and helplessness.

Wali speaks of the invisible scar carved into his heart by his intense yearning for the beloved. Since an internal emotional wound cannot be directly shown, he offers his physical frailty and utter helplessness as living proof of that devotion. True longing is portrayed here not merely as an abstract ache, but as an overwhelming force that visibly exhausts the lover's entire being.