If you know what a dollar is worth, try to borrow it.
More Portuguese Proverbs:
Beware of the dog that does not bark.Portuguese
Of two cowards, the one who attacks conquers the other.
Portuguese
Better is my neighbour's hen than mine.
Portuguese
A friend's fault should be known but not abhorred.
Portuguese
Taking out without putting in, soon comes to the bottom.
Portuguese
Not all that is true is to be spoken.
Portuguese