My tongue's concealed condition was nothing, so it did not hear that this lifeless body was becoming.

This profound couplet speaks of the power of silence and concealed suffering. The poet suggests that if his true feelings or the state of his heart (the tongue's secret) had been revealed, the beloved would not have realized the depth of his pain or the fragile state of his being. It’s a melancholic acknowledgment that sometimes, the deepest emotions must remain hidden to survive the harsh reality of love.