Since the news of your letter arrived, my soul has come to rest upon my lips, as if it is delicately balanced there in eager anticipation.

This beautiful couplet captures the subtle yet profound effect that love letters have on a woman's demeanor. The poet suggests that since she started receiving news of his letters, her very natural grace—the charm of her lips—has become something else entirely. It implies that his words have transformed her beauty and her presence, making her allure dependent on his correspondence. It's a delicate portrayal of how emotional connection manifests physically.