Thank you very much! :) Yeah, there's a lot to explore with this idea, really -- I was trying to keep it short and (relatively) simple, but there are a ton of angles to look at it from.

it's the heart without which there is no life.

Yes, this. That is the core of Duncan for me. His sense of honor and justice is not something he can put on and take off like an overcoat. It's the deepest essence of who he is.