In at one ear and out at the other.
More Italian Proverbs:
A favor to come is better than a hundred received.Italian
When the fox preaches, take care of yourselves, hens.
Italian
He who is in hell knows not what heaven is.
Italian
Happy is she who is in love with an old dotard.
Italian
One daughter helps to marry the other.
Italian
Beware of a poor alchemist.
Italian