Now let out such a cry of pain that it actually has an effect on that person. O heart, what is the use even if you breathe another deeply effective sigh?

In this couplet, the poet speaks directly to his own weary heart with a poignant mix of frustration and longing. He urges his heart to let out a cry so profound and piercing that it finally melts the beloved's indifference, questioning the worth of all past 'potent' sighs that ultimately changed nothing. It captures that exhausting threshold in love where even the most deeply felt grief feels useless unless it can genuinely bridge the distance between two souls.