Speak well of the dead or not at all.
More Polish Proverbs:
Who wakes up early, Lord God provides him.Polish
It is a poor parish where the priest has to ring his own bells.
Polish
It was Blacksmith's guilt, but the Gypsy was hanged.
Polish
Beauty does not season soup.
Polish
God promised me a fur coat and I'm already sweating.
Polish
He who lies once is never believed again.
Polish