Shakespeare’s speaker begins with a painful admission: though their love is whole and undivided, they must live as two separate people. He carries “blots”—stains on his reputation—and insists on bearing that shame alone, unwilling to let it touch the person he loves. A strange split runs through their lives: their love remains one, yet a “separable spite” keeps stealing the sweet hours they long to share.
Because of his guilt, he can never openly claim the beloved, nor accept public honor from them, lest his disgrace soil their name. That is the heart of the poem—an aching need to protect the other from himself. Then the final couplet offers a soft, resolved plea: do not try to honour me. Your good name is my good name. The mood is tender, solemn, and fiercely devoted, heavy with the sadness of a love that must be hidden for the sake of love itself.