The food that you put into your mouth doesn't make you unclean and unfit to worship God. The bad words that come out of your mouth are what make you unclean.”
Jesus left and went to the region near the city of Tyre, where he stayed in someone's home. He did not want people to know he was there, but they found out anyway.
Everything is pure for someone whose heart is pure. But nothing is pure for an unbeliever with a dirty mind. That person's mind and conscience are destroyed.