He knows well where the thorn pricks him.
More Italian Proverbs:
Friendships are cheap when they can be brought by doffing the hat.Italian
No good lawyer ever goes to court himself.
Italian
In the country of the blind the one eyed man is king.
Italian
A gift long waited for is sold, not given.
Italian
Among thorns grow roses.
Italian
Every bird thinks its own nest beautiful.
Italian