The dog that barks much, bites little.
More Portuguese Proverbs:
Concealed goodness is a sort of vice.Portuguese
All bite the bitten dog.
Portuguese
Three or four daily will bring you to the bottom of the sack.
Portuguese
Never mention rope in the house of a man who has been hanged.
Portuguese
I want more for my teeth than for my relations.
Portuguese
Sweet are the tears that are dried by your loved one.
Portuguese