No one can blow and swallow at the same time.
More German Proverbs:
They quarrel about an egg and let the hen fly.German
Where there's no jealousy, there's no love.
German
Thousands drink themselves to death before one dies of thirst.
German
If you don't light fires, smoke won't get in your eyes.
German
Ducats are clipped, pence are not.
German
As the tree, so the fruit.
German