Set a fox to catch a fox.
More German Proverbs:
Those that rule must hear and be deaf, must see and be blind.German
Let sleeping dogs lie.
German
Make yourself an ass, and you'll have every man's sack on your shoulders.
German
Well-done outlives death.
German
To get to know a friend, you must share an inheritance with him.
German
Speak, that I may see thee.
German