A sparrow in the hand is better than a pigeon on the roof.
More German Proverbs:
Full vessels give the least sound.German
A mistake is no fraud.
German
She is fond of him--on the side where the pocket hangs.
German
An old error is always more popular than a new truth.
German
He who conceits himself wise, has an ass near at hand.
German
Eyes trust themselves, ears trust others.
German