The same hammer that breaks the glass forges the steel.
More Italian Proverbs:
He who is unable is always willing.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
It is easy robbing when the dog is quieted.
Italian
Nothing can come out of a sack but what is in it.
Italian
Diseases are the visits of God.
Italian
All that's fair must fade.
Italian