In Isaiah 29:13, Lord talks about a group of people who honour him with their lips yet their hearts are far from Him.I think Matthew 21:28-31, has a strong message of two sons whose father owned a vineyard and instructed the first to work in the vineyard that day. He refused saying he will not but later changed his mind and did as his father asked. The father went yo the second asking the same, now this one said he will go , sir ...he even added sir hmm...but did not go.....the question is asked which of the two did the will of the father? .....I can give you a practical example some religious leaders preach but cannot back up what they say with the word of God, some people post about God but only live in the mirror of their Christianity. They are not even who they appear to be! We became a BY PRODUCT OF OUR OWN SALVATION!!!