The full cask makes no noise.
More Italian Proverbs:
A dog that bites silently. [An insidious tradcuer. He would kill you with an air-gun.]Italian
Who has never done thinking never begins doing.
Italian
The donkey won't drink if he can't see water.
Italian
What has not been, may be.
Italian
He is a sorry barber who has but one comb.
Italian
A volunteer is worth twenty pressed men.
Italian