He can hear that certainty, which again makes him wonder when this man is from. Cassian hates not having as much information as this man has about him and that older Anakin wouldn't share what he knew.

The galaxy needs to be free and the Empire is powerful, he won't argue that, "No, if people can feel safer and be free then its not fruitless."

It has to be, that's the belief that he's built his life around, given himself to. He tries to keep his voice steady, not let too much emotion show but his passion comes through.