The Holy Spirit indwells each individual who is truly born-again. So it starts there and each person is to learn and know the bible for themselves (with the help of the Holy Spirit) so when being in a group you will Know Jesus Christ and His word and will not be deceived by men.
Galatians 5:16: “But I say, walk by the Spirit, and you will not carry out the desire of the flesh. For the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another, so that you may not do the things that you please. But if you are led by the Spirit, you are not under the law. Now the deeds of the flesh are evident, which are: immorality, impurity, sensuality, idolatry, sorcery, hatred, strife, jealousy, outbursts of anger, disputes, dissensions, factions, envying, drunkenness, carousing, and things like these, of which I forewarn you, just as I have forewarned you, that those who practice such things will not inherit the kingdom of God. But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law. Now those who belong to Christ Jesus have crucified the flesh with its passions and desires. If we live by the Spirit, let us also walk by the Spirit.”
That is what it means to live the Christian life. And we shall remember that Paul is confronting legalism, external ritual and ceremony, and he is saying that legalism can’t save you in the first 4 chapters of Galatians. And in chapter 5, he is saying legalism can’t even sanctify you. You are not made holy by external religious behaviors; you are made holy by walking by the Spirit. It is not external behavior, it is internal power. The Holy Spirit will always point you to Jesus Christ and will never point to any other.
Plow on, plow on....