There are surfaces that scuttle, becoming thinner. Hardly a scratch on one side of it was marked by sandpaper. On the other hand, no visible surface is at all smooth at first.
Two sides displayed without misrepresenting each other.
What is important to remember is that it takes no pride in its evil.
To make it more specific: it is the parable of the problematic.
The two sides reflected that it was unwilling, whether you like it or not. Life's journey goes on despite your condition.