He that touches pitch defiles himself.
More Danish Proverbs:
A hard bit does not make the better horse.Danish
One raven does not peck out another's eyes.
Danish
Better cross an angry man than a fasting man.
Danish
Meddle with dirt and some of it will stick to you.
Danish
Young pigs grunt as as old pigs grunted before them.
Danish
Every man must carry his own sack to the mill.
Danish