The wolf changes his teeth, but not his disposition.
More Spanish Proverbs:
Corsair against corsair nothing is got but empty casks.Spanish
Under my cloak I kill the king.
Spanish
The sharper the storm, the sooner it's over.
Spanish
The devil is so fond of his son that he put out his eye.
Spanish
Expect not at another's hand what you can do by your own.
Spanish
Women, melons, and cheese are bought by the weight.
Spanish