Know what you say, but don’t say all that you know.
More Dutch Proverbs:
He that can reply to an angry man is too hard for him.Dutch
He lives long who lives well.
Dutch
One penny in the pot makes more noise than when it is full.
Dutch
Fair money can cover much that's foul.
Dutch
A fool may chance to say a wise thing.
Dutch
A fool may chance to say a wise thing.
Dutch