Where there’s no might there’s no right.
More Portuguese Proverbs:
Better is my neighbour's hen than mine.Portuguese
Who will not when he can, can't when he will.
Portuguese
He has nothing, for whom nothing is enough.
Portuguese
Hard upon hard does not make a good wall.
Portuguese
Much law, but little justice.
Portuguese
You have lent and not recovered; and if recovered, not so much; and if so much, not such; and if such, a mortal enemy.
Portuguese