Remember, some people appear to say the right things, but their actions betray their words. Jesus quoted Isaiah 29:13 in reference to such people: “These people honor me with their lips, but their hearts are far from me. They worship me in vain; their teachings are merely human rules.” This was in the context of Jesus explaining what defiles a person in Matthew 15. Jesus went on to explain that people like the Pharisees are “blind guides” and instructs those listening to leave them!
