Love your friend with his faults.
More Italian Proverbs:
Public money is like holy water; everyone helps himself to it.Italian
Credit lost is like a broken looking-glass.
Italian
The devil will tempt Lucifer.
Italian
A priest is a man who is called Father by everyone except his own children who are obliged to call him Uncle.
Italian
A favor to come is better than a hundred received.
Italian
It is better if you could say "Here he ran away" than "Here he was killed."
Italian