If you don’t want to be deceived, you must have as many eyes as hairs on the head.
More German Proverbs:
A small gift is better than a great promise.German
Talking is easier than doing, and promising than performing.
German
As won, so spent.
German
The wood has ears, the field has eyes.
German
The best friends are in one's purse.
German
One log does not burn long by itself.
German