A bad tree does not yield good apples.
More Danish Proverbs:
The dearer the child, the sharper must be the rod.Danish
He who lies down in the wash will be eaten by swine.
Danish
What is play to the cat is death to the mouse.
Danish
If you would catch a fox you must hunt with geese.
Danish
He who would save, should begin with the mouth.
Danish
You may take a horse to the water, but you can't make him drink.
Danish