Don’t sell the bear-skin before you have killed the bear.
More German Proverbs:
Let every pedlar carry his own pack.German
When the fox wants to catch geese, he wags his tail.
German
He who has no enemies has no friends either.
German
Many children, and little bread, is a painful pleasure.
German
Confidence begets confidence.
German
A good trade will carry farther than a thousand florins.
German