The Catechism of the New Apostolic Church

1.4.3 Belief in God, the Holy Spirit

The Holy Spirit's activity is already attested in the Old Testament: kings and prophets were guided by the Holy Spirit (Psalm 51: 11; Ezekiel 11: 5).

According to the words of the Lord, the Holy Spirit's activity in the New Testament is divine revelation (John 14: 16-17, 26). Here too, the only appropriate response for mankind is faith, namely faith in the Spirit, who presently guides into all truth and reveals God's will.