Every one finds fault with his own trade.
More Italian Proverbs:
So good that he is good for nothing.Italian
It is too late to come with water when the house is burnt down.
Italian
Imagination gallops, judgment merely walks.
Italian
Woman decides impromptu; man, on reflection.
Italian
Fair words, but look to your purse.
Italian
Give the wise man a hint and leave him to act.
Italian