The bible teaches that a man can be very religious and still be dead, in fact dead in works and even, twice dead. Without the indwelling gift of the Holy Spirit he is not quickened unto spiritual life.
Amen! Without the indwelling Holy Spirit, we are all dead spiritually. He is the one who convicts us of our sins, comforts us in our sorrows and tribulations, keeps us going when we want to quit. What would we do without Him?