To make an error is human, keep doing it is foolishness.
More Portuguese Proverbs:
He is no friend that eats his own by himself, and mine with me.Portuguese
To sell honey to one who keeps hives.
Portuguese
If you would make an enemy, lend a man money, and ask for it back again.
Portuguese
Though we are negroes, we are men, and have souls.
Portuguese
In a quarrel between a husband and his wife, keep away.
Portuguese
Send a man of sense on the embassy, and you need not instruct him.
Portuguese