The rotten apple injures its neighbour.
More Italian Proverbs:
The chamber-bell is the worst sound one have in his ears.Italian
He who grasps too much holds nothing fast.
Italian
He who knows the road can ride full trot.
Italian
He who knows the road can ride full trot.
Italian
He is a fool who does not know from what quarter the wind blows.
Italian
The sun loses nothing by shining into a puddle.
Italian