What does not poison, fattens.
More Italian Proverbs:
A good cavalier never lacks a lance.Italian
Good repute is like the cypress: once cut, it never puts forth leaf again.
Italian
No day in which you learn something is a complete loss.
Italian
Translators, traitors.
Italian
All the honey a bee gathers during its lifetime doesn't sweeten its sting.
Italian
Rather hat in hand than hand in purse.
Italian