Aboard the Papal plane: Pope Francis says there are limits to freedom of expression, especially when it insults or ridicules someone's faith.
Francis spoke on Thursday about the Paris attacks while en route to the Philippines. He defended freedom of expression as not only a fundamental human right but a duty to speak one's mind for the sake of the common good.
But he said there were limits.
By way of example, he referred to Alberto Gasparri, who organizes papal trips and was standing by his side.
He said: "If my good friend Dr. Gasparri says a curse word against my mother, he can expect a punch. It's normal. It's normal. You cannot provoke. You cannot insult the faith of others. You cannot make fun of the faith of others."