Holy Spirit in Christianity

===God the Holy Spirit===
{{Main article|God in Christianity|Nontrinitarianism}}
[[File:Shield-Trinity-Scutum-Fidei-English.svg|thumb|right|upright=0.8|A depiction of the [[Trinity]] consisting of God the Holy Spirit along with [[God the Father]] and [[God the Son]] ([[Jesus in Christianity|Jesus]])]]
The Christian doctrine of the [[Trinity]] includes the concept of God the Holy Spirit, along with [[God the Son]] and [[God the Father]].<ref>''Systematic Theology'' by Lewis Sperry Chafer 1993 {{ISBN|0825423406}}, p. 25.</ref><ref name="Wiersbe471">''The Wiersbe Bible Commentary: The Complete New Testament'' by Warren W. Wiersbe 2007 {{ISBN|978-0781445399}}, p. 471.</ref> Theologian [[Vladimir Lossky]] has argued that while, in the act of the [[Incarnation (Christianity)|Incarnation]], ''God the Son'' became manifest as the [[Son of God]], the same did not take place for ''God the Holy Spirit'' which remained unrevealed.<ref name="Donnell">''The mystery of the Triune God'' ... Whatever, therefore, is spoken of God in respect to Himself, is both spoken singly of each person, that is, of the Father, and the Son, and the Holy Spirit; and together of the Trinity itself, not plurally but in the singular. by John Joseph O'Donnell 1988 {{ISBN|0722057601}}, p. 75.</ref>{{Failed verification|date=September 2020}} Yet, as in 1 Corinthians 6:19,<ref>[[s:Bible (American Standard)/1 Corinthians#6:19|1 Corinthians 6:19]]</ref> God the Spirit continues to dwell in the faithful.<ref name=Wiersbe471 />

In a similar way, the Latin treatise ''De Trinitate'' (''[[On the Trinity]]'') of [[Augustine of Hippo]] affirms: "For as the Father is God, and the Son is God, and the Holy Spirit is God, which no one doubts to be said in respect to substance, yet we do not say that the very Supreme Trinity itself is three Gods, but one God. ...But position, and condition, and places, and times, are not said to be in God properly, but [[Metaphor#As a foundation of our conceptual system|metaphorically]] and through [[Analogy#Religion|similitudes]]. ...And as respects action (or making), perhaps it may be said most truly of God alone, for God alone makes and Himself is not made. Nor is He liable to passions as far as belongs to that substance whereby He is God. ...So the Father is omnipotent, the Son omnipotent, and the Holy Spirit is omnipotent; yet not three omnipotents, but one [[Omnipotence#Meanings|omnipotent]]. ...Whatever, therefore, is spoken of God in respect to Himself, is both spoken singly of each [[Personal identity#Continuity of substance|Person]], that is, of the Father, and the Son, and the Holy Spirit; and together of the Trinity itself, not plurally but in the singular."<ref>{{cite web | url = http://www.newadvent.org/fathers/130105.htm | title = 'De Trinitate', Book V, chapter 8 | website = newadvent.org | archive-url = https://web.archive.org/web/19991013043702/http://www.newadvent.org/fathers/130105.htm | archive-date = October 13, 1999 | url-status = live}}</ref>

In Christian theology the Holy Spirit is believed to perform specific divine functions in the life of the Christian or the church. The action of the Holy Spirit is seen as an essential part of the bringing of the person to the Christian faith.<ref name="Erickson265">{{cite book |author=Erickson |first=Millard J. |title=Introducing Christian Doctrine |publisher=Baker Book House |year=1992 |pages=265–270 |language=en}}</ref> The new believer is "born again of the Spirit".<ref>Though the term "[[Born again (Christianity)|born again]]" is most frequently used by evangelical Christians, most denominations do consider that the new Christian is a "new creation" and "born again". See for example the Catholic Encyclopedia [http://www.newadvent.org/cathen/02258b.htm].</ref> The Holy Spirit enables Christian life by dwelling in the individual believers and enables them to live a righteous and faithful life.<ref name=Erickson265/> The Holy Spirit also acts as comforter or [[Paraclete]], one who intercedes, or supports or acts as an advocate, particularly in times of trial. And he acts to convince the unredeemed person both of the sinfulness of their actions and of their moral standing as sinners before God.<ref>''The Holy Spirit and His Gifts''. [[J. Oswald Sanders]]. Inter-Varsity Press. Chapter 5.</ref> Another faculty of the Holy Spirit is the inspiration and interpretation of scripture. The Holy Spirit both ''inspires'' the writing of the scriptures and ''interprets'' them to the Christian and the church.<ref>{{cite book |author=Hammond |first=T. C. |title=In Understanding be Men: A Handbook of Christian Doctrine |publisher=[[Inter-Varsity Press]] |year=1968 |editor=Wright |editor-first=David F. |edition=Sixth |page=134 |language=en}}</ref>