In what way does Colonel Owens's identity as a father depend on Grandison and the other slaves in "The Passing of Grandison"? In what way does it depend on Dick?

Colonel Owens clearly views himself as a sort of paternal figure of authority. He sees himself as wiser and more enlightened than the abolitionists who want to free slaves. He thinks he understands slave psychology, pointing out that Grandison is a loyal slave who would never try to escape. His behavior towards Grandison is condescending in the paternalistic manner—he might not beat or otherwise abuse his slaves, but he views them as inferior beings who need a kind master to keep them in line.
Owens views his son in a rather condescending manner as well, though he does not dehumanize him the way he does the slaves, obviously. He's mostly frustrated by Dick's sometimes foolish behavior.
Colonel Owens's conception of himself as a father figure crumbles when Grandison tricks him and his son disobeys him by trying to get Grandison into Canada. He learns he is not respected and that he didn't know anything about how how his slaves really felt about their situation.