"I could not sustain the horror of my situation; and when I percieved that the popular voice, and the countenances of the judges, had already condemned my unhappy victim, I rushed out of the court in agony. The tortures of the accused did not equal mine; she was sustained by innocence, but the fangs of remorse tore my bosom, and would not forego their hold"
Here we can see clearly that the theme is the guilt.
The monster is talking about her fellings and also what he is thinking about the situation that is hapening, he is there only lurking and watching what the court is going to do with Justine because they found in their pocket a picture that William had in his pocket before he was killed in the hands of the monster, he is doing a reflection and he felt guilty as we see in "but the fangs of remorse tore my bosom".
