Nothing can come out of a sack but what is in it.
More Italian Proverbs:
He who lets the goat be laid on his shoulders is soon after forced to carry the cow.Italian
Better give than not to have to give.
Italian
When wise men play mad pranks they do it with a vengeance.
Italian
He that is drowning shouts though he be not heard.
Italian
Smooth words do not flay the tongue.
Italian
If you would succeed, you must not be too good.
Italian