The dog that barks much is never good for hunting.
More Portuguese Proverbs:
The Frenchman sings well, when his throat is moistened.Portuguese
Change yourself, and fortune will change with you.
Portuguese
Every peddler speaks highly about his own needles.
Portuguese
Stumbling is not falling.
Portuguese
Where there is no honour there is no dishonour.
Portuguese
Trust not a new friend or an old enemy.
Portuguese