The speaker addresses someone absent or dead, a thing, a place or an idea, as if they could hear.
In Othello
I kissed thee ere I killed thee. No way but this, / Killing myself, to die upon a kiss.
Othello speaks to Desdemona's dead body: "I kissed you, then I killed you". He addresses her as if she could hear him, and it is to her, not to those present, that he says what is left for him to do.