Never fight an enemy whilst it is possible to cheat him.
More German Proverbs:
Out of the fulness of the heart the mouth speaketh.German
There is nothing so bad but may be of some use.
German
There the hedge is lowest, men leap over.
German
Man without woman, is head without body; woman without man, is body without head.
German
Old pottage is sooner heated than new made.
German
Let the devil get into the church, and he will mount the altar.
German