Who is Paul's Old Man?

When people think about the Old Man (as opposed to the New Creation) in Paul's letters in the New Testament, they've been trained to picture a despicable creature, one who still has dirt on his face and holes in his clothes, who hasn't shaved, who goes about indulging in every selfish and pig-headed desire, who is little more than an animal dressed up in human clothing.

But what if the Old Man inside me doesn't look like that at all? Does not even Lucifer come disguised as an angel of light?

...Food for thought...