We'd all like to think that we're better than our hearts tell us to be. That humans are creatures of intellect and reason. [he's so desperately tried to believe that, not only of himself but of everyone around him, based so many plans on that assumption only to be left baffled by the whimsical emotions of others] --But that's almost never the case.
What-- my father did [and his expression is a tiny bit shuttered because he really, honestly can't express what a violation it was, Guilford doesn't know how good he had it not to be awake and screaming while the geass took over his brain] was an intellectual, reasoned choice. What you did was fueled by grief and hurt and despair, emotions that they wanted you to feel. They manipulated those events, make no mistake of it.
[and he takes a breath, and lets it go] It's okay. ...it really is.