If advice will not improve him, neither will the rod.
More Greek Proverbs:
Mountains are used to snow.Greek
An iron rod bends while it is hot.
Greek
All things good to know are difficult to learn.
Greek
He who cannot bear misfortune is truly unfortunate.
Greek
No one loathes the smell of himself.
Greek
Milk the cow, but do not pull off the udder.
Greek