A mouse will scare a thief.
More Italian Proverbs:
He who takes a woman gives away his freedom.Italian
In prosperity no altars smoke.
Italian
He may lie safely who comes from afar.
Italian
A cat that licks the spit is not to be trusted with roast meat.
Italian
If you would succeed, you must not be too good.
Italian
He got out of the mud and fell into the river.
Italian