Advice after injury is like medicine after death.
More Danish Proverbs:
Hair by hair and the head gets bald.Danish
It is no use hiding from a friend what is known to an enemy.
Danish
The hen is ill off when the egg teaches her how to cackle.
Danish
The corn that is taken to a bad mill. will be badly ground.
Danish
Sickness comes uninvited--no need to bespeak it.
Danish
He who has a glass roof on his own house, must not throw stones at others.
Danish