The reference to swine is about the nature of a creature that does not carefully consider its food (does not chew the cud), it is that nature that the law concerning swine is given for. The lack of discernment of the thing so God is not acceptable to God's people. That is why it became law; which is against the nature of the creature. To not eat pork will not save a person. But to understand the meaning of the law, which Jesus gave many examples concerning swine, will help a person understand something about himself.