I have never accepted nor will I ever accept that they are unfaithful; it is entirely the mischief of my own heart, while the eyes are merely an excuse.

In this couplet, the lover passionately shields the beloved from any accusation of cruelty or betrayal, stubbornly refusing to brand them unfaithful. Instead, he tenderly turns the blame inward, claiming that any longing or tears are merely the playful mischief of his own restless heart, using the eyes as a simple pretext. It beautifully portrays the sweet, blind devotion of love, where one would far rather fault oneself than ever admit a single flaw in the one they cherish.