This afternoon, I read a short story that relates to 2 Bible passages…
 
A little girl was once looking at a sheep as it ate green grass.  She thought to herself how nice and white the sheep looked against the green grass.  Then it began to snow.  The little girl then thought how dirty the sheep looked against the white snow.  It was the same sheep, but with a different background.
 
When we compare ourselves to the background of man’s standards, we come up reasonably white and clean.  Compared to other people, we don’t see the wickedness of our sin. 
 
However, when we compare ourselves to the snow-white righteousness of the Law of God, we see that we are all as an unclean thing, and our righteous deeds are as filthy rags.  We see that we are insufficient in and of ourselves and it drives us to Jesus who loves us and died for us.
 
For some Bible verses that talk about this, look up…
Isaiah 64:6 and Luke 16:15