How did Victor's personality change while he was working on the monster?

During the time that he
works on his creature,says that his "cheek had grown pale with study, and [his] person had
become emaciated with confinement."He rarely went out or participated in anything aside
from his work.He clung to hope, even in the face of failure and "with unrelaxed and
breathless eagerness, [he] pursued nature to her hiding-places."He claims that "a
resistless and almost frantic impulse urged [him] forward," and he feels that he lost
"all soul or sensation" except for the one goal: making his creature.Victor calls the
attitude with which he worked a "passionate...