Okay let's be real here. We all have that little blemish that no matter how hard we try, we can't seem to wipe it away from our perfect windshield of an existence.
In writer terms, that would be a character flaw.
It could be anything. Something physical, something mental, something pink. The possibilities are endless (unfortunately).
And how do we get rid of that annoying triangle? It requires someone coming and cleaning it off manually. But sometimes it never truly goes away.
There IS someone who can wipe away the smear that our wiper blades can't seem to reach. Our Lord and Savior. By the blood of Jesus Christ we are cleaned.
Does that mean it will stay away forever? Not always, but He will always be there to wipe it away again.