Just because a person is always talking about the Lord, that is no evidence the Lord is pleased with that person (Matthew 15:7-8). The reason being, many people speak a great deal about God, but they aren’t doing what He commanded (Luke 6:46).
They don’t live their lives in the manner God wants and they aren’t even in the right church (Isaiah 59:1-3; Mark 7:7-13; Matthew 15:9-14; 2 John 9-11; Matt. 7:21-27).
A person who carries a Bible and quotes the Bible and lives like a dog, is not a child of God. That person is a fake. A person who goes around saying “blessed,” “God is good,” “praise the Lord,” etc, etc, etc. Then teach and practice doctrine that isn’t found in the Bible, is a false teacher (2 Peter 2:1-3; Matt. 7:15-20). Protect yourself against such people by learning what the Bible teaches yourself. You can understand the word of God if you apply yourself to learn it (John 8:31-32). Once you know what it teaches you can expose fakes just like the people did in the old days (Revelation 2:2; Acts 17:11; 1 John 4:1-3).