Poison quells poison.
More Italian Proverbs:
It is a bad thing to be poor, and seem poor.Italian
Bitter fruit will fall before the ripe.
Italian
He who wants milk should not sit in the middle of a field and wait for a cow to back up to him.
Italian
Every bird thinks its own nest beautiful.
Italian
All tastes are tastes.
Italian
One devil drives out another.
Italian