The sure fire evidence of whether someone’s religion is pure or not is in what they say. The Bible says that if our tongue is not bridled, our religion is worthless. The true Christ follower’s mouth is bridled by the Holy Spirit. Someone indwelled with the Holy Spirit speaks with wisdom and not foolishness, righteousness and not wickedness. Isaiah confessed that he was a man of unclean lips and the Lord purified him of his iniquity. Do you need to be cleansed of unclean lips and heart so that the religion you assert is truly pure?