 Shame sets in pretty early. And this guy's referring to shame as being a bad thing. Shame is just like the nerve endings in your hand. When you put your hand on a stove, you feel pain. That pain is unpleasant, perhaps, but it's a good thing because it tells you you're doing something that's harmful to you. Well, shame is like that as well. Shame is like that in just a slightly more abstracted way. But shame is a reminder that you're doing something that is shameful, that is not good for you, and you ought to stop doing it.