It is difficult to trap an old fox.
More Danish Proverbs:
The goose goes so often into the kitchen, till at last she sticks to the spit.Danish
It is a great art to laugh at your own misfortune.
Danish
Faint praise is akin to abuse.
Danish
He who flees, proves himself guilty.
Danish
Every foal is not like its sire.
Danish
The year has a wide mouth and a big belly.
Danish