On Sunday, 24 May, we celebrate Pentecost—a pivotal moment in the Christian calendar. It is the day when the global Church remembers the outpouring of the Holy Spirit: foretold by the prophet Joel (Joel 2:28), promised by Jesus himself (John 14:16–17, 26; John 15:26; John 16:7–15; Luke 11:13; Luke 24:49), and dramatically received at the birth of the New Testament Church (Acts 2). Pentecost marks God’s empowering presence dwelling not merely among his people, but within them.

In light of this celebration, the following two articles explore the person and work of the Holy Spirit—who he is, what he does, and why his ongoing ministry is essential to the life, witness, and mission of the Church today.

As always, I’m happy to take questions or have follow up conversations.

Who Is the Holy Spirit?

As a church, we regularly recite the Apostles’ Creed: “I believe in the Holy Spirit.” It’s a familiar line—but what does it actually mean?

Historically, that phrase likely formed part of early baptismal confessions—a kind of call-and-response declaration for new believers. If that’s true, then belief in the Holy Spirit isn’t a secondary doctrine or a niche interest. It sits at the very heart of Christian faith and discipleship.

So, the question presses in: can we genuinely, wholeheartedly say, “we believe in the Holy Spirit”?

To answer that, we need to think carefully about who the Holy Spirit is, what he does, and how he shapes both our lives and our life together as the Church.

Why the Holy Spirit Can Feel Elusive

For many Christians, the Holy Spirit is the most difficult person of the Trinity to grasp.

God the Father, at least conceptually, feels accessible—we have some understanding of fatherhood, even if our own experiences are mixed. Jesus is even more tangible. The Gospels give us story after story: we see him speak, act, weep, confront, and restore.

But the Holy Spirit? He can feel harder to pin down. Is he a force? A feeling? A presence? A kind of divine energy or even a holy Ghost (using KJV language)?

That confusion matters. Because when we’re unclear about who the Spirit is, we can end up attributing all sorts of strange or unhealthy things to him. If something feels spiritual or supernatural, we may instinctively assume, “that must be the Holy Spirit.”

But simply using the language of the Spirit doesn’t mean we’re talking about the Spirit of the Bible. Without clarity, it’s easy to drift into something closer to vague spirituality than historic Christianity.

So, we return to Scripture.

Jesus’ Teaching: John 14:15–18

On the night before his crucifixion, Jesus prepares his disciples for his departure. He knows they will feel disoriented, even afraid. So he begins with reassurance: “Let not your hearts be troubled…” (John 14:1).

And at the centre of that reassurance is the promise of the Holy Spirit:

“I will ask the Father, and he will give you another advocate to help you and be with you forever—the Spirit of truth.” (John 14:16–17)

What Jesus says here gives us a framework for understanding who the Holy Spirit is.

1. The Desire of Jesus

Notice this: Jesus asks the Father to send the Spirit.

At this critical moment—facing the cross, carrying the weight of redemption—Jesus prioritises this request. His desire is that his followers would know and experience the Holy Spirit.

That alone should recalibrate us. Knowing the Spirit is not for a select few or a particular tradition. It is central to the Christian life.

Jesus goes even further:

“It is for your good that I am going away… unless I go away, the Advocate will not come to you.” (John 16:7)

That’s a staggering claim. Jesus is saying that, for his disciples, life with the Spirit will be better than life with him physically present.

The implication is unavoidable: the presence of the Holy Spirit is not optional—it is essential.

2. The Holy Spirit Is a Person

One of the most important clarifications we need is this: the Holy Spirit is not an “it.” He is a person.

In John 14–16, Jesus repeatedly refers to the Spirit as “he” or “him.” This is not accidental language. It reflects personhood, not impersonal force.

And the rest of Scripture confirms this. The Holy Spirit:

• speaks (Revelation 2:7)
• knows (1 Corinthians 2:10–11)
• has a will (Acts 16:6–7)
• intercedes (Romans 8:26)
• can be grieved (Ephesians 4:30)
• leads and appoints (Acts 13:2)

These are not the actions of an abstract power. They are the characteristics of a personal agent.

Even the language of fellowship with the Spirit (2 Corinthians 13:14) points in the same direction. The New Testament word koinonia implies relational participation—shared life, mutual knowing. That simply doesn’t make sense if the Spirit is just a force.

If we reduce the Spirit to a feeling or an energy, we fundamentally misunderstand him. The Spirit is someone we relate to, not something we use.

3. “Another” Like Jesus

Jesus says the Father will send “another advocate.” That word another is crucial.

In the original language, it means “another of the same kind.” Not something different, but someone like Jesus himself.

In other words, the Spirit continues the presence and ministry of Jesus among his people.

Just as Jesus reveals the Father—“if you have seen me, you have seen the Father”—so the Spirit makes Jesus known to us. He is not a lesser substitute, but a fully divine person, equal in nature.

Scripture consistently affirms this. The Spirit is identified with God (Acts 5:3–4), possesses divine attributes (eternal, all-knowing, ever-present), and is named alongside the Father and the Son in Trinitarian passages (Matthew 28:19).

So, when we speak of the Holy Spirit, we are speaking of God himself—present with us and at work in us.

4. The Spirit as Our Helper

Jesus describes the Spirit as an “advocate” (or helper, counsellor, comforter). No single English word captures the richness of the original term.

At its core, it describes someone who comes alongside to support, strengthen, and represent.

Think less of a distant adviser and more of a committed ally—someone who stands with you in moments of pressure, confusion, or opposition.

The Spirit doesn’t merely give abstract guidance. He actively applies the truth of God to our lives, bringing clarity, conviction, comfort, and courage.

But here’s something we often miss: this ministry is not primarily individual.

While the Spirit certainly works in us personally—bringing new birth, assurance, and transformation—the New Testament places strong emphasis on his work among us together.

We are not just a collection of Spirit-filled individuals. We are a Spirit-filled people.

Passages like 1 Corinthians 12–14 only make sense in a corporate context. The Spirit gifts, leads, and empowers the church as a body. His presence is not just in me, but among us.

Bringing It Together

So, who is the Holy Spirit?

He is not a vague force, a spiritual mood, or a divine energy to be activated. He is the third person of the Trinity—fully God, fully personal, and fully present.

He is “another” like Jesus—continuing Christ’s presence and work in the world.

He is the one who comes alongside us: applying Scripture, strengthening faith, shaping character, and forming us into a people who reflect Jesus together.

And according to Jesus himself, knowing him is not optional—it is essential.

The Mission of the Holy Spirit

In the first article, we asked a foundational question: who is the Holy Spirit? We saw that he is not a vague force or spiritual energy, but the third person of the Trinity—fully God, fully personal, and fully present with his people.

Now we turn to a second question: what is the mission of the Holy Spirit?

To answer that, we begin with a familiar verse and then widen the lens to see how it fits into the sweeping story of Scripture.

Power for Witness

“You will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.” (Acts 1:8)

At one level, the answer seems straightforward. The Holy Spirit empowers the church for mission. Jesus promises that when the Spirit comes, his followers will be strengthened to bear witness—locally, regionally, cross-culturally, and globally.

That is a good and faithful reading of the text.

But we need to tread carefully. This verse has often been used in ways that stretch beyond what it actually says. For example, you may have heard it suggested that the word “power” here implies something explosive—like dynamite. It makes for a vivid illustration, but it doesn’t hold up. Dynamite wasn’t invented until the nineteenth century, so that idea would have been entirely foreign to Luke’s original context!

The word simply means power, strength, or enablement. Jesus is not promising spectacle; he is promising strength. When the Spirit comes, the church will be enabled to bear faithful witness.

That’s important. Because it reframes what we expect. The book of Acts does contain moments of dramatic intervention, but the dominant pattern is one of costly, persevering witness—often marked by suffering rather than spectacle.

The Spirit does not primarily produce hype; he produces a people who testify to Jesus, whatever the cost.

Beyond a Narrow View of Mission

Even so, if we stop there, our understanding remains too small.

It’s easy to hear Acts 1:8 as little more than a call to evangelistic activity—almost like the Spirit is a kind of spiritual fuel for outreach. But the Bible invites us to see something far bigger.

To understand the mission of the Spirit, we need to place Pentecost within the grand narrative of redemption.

From Unity to Division

The story begins with unity.

Humanity is created for oneness—first in Adam, then in the union of Adam and Eve. But sin fractures that unity. Immediately, we see separation: hiding, blame, alienation. What was meant to be one becomes divided.

That division deepens quickly. By the next generation, it culminates in violence as Cain kills Abel. Sin doesn’t just disrupt our relationship with God; it tears apart human community.

This pattern spreads across the earth, reaching a kind of climax at Babel (Genesis 11). There, humanity appears united again—but it is a false unity, built around self-glorification rather than the worship of God.

The people gather to make a name for themselves, constructing a city and tower that centre on human achievement. In response, God scatters them and confuses their language. The unity is broken—not because unity is bad, but because it was rooted in the wrong centre.

Babel matters. Because it shows us both the human longing for unity and the danger of building it apart from God.

The Promise of a New Humanity

Into that fractured world, God speaks a promise to Abraham.

He promises to make Abraham’s name great—not as an echo of Babel’s self-exaltation, but as part of a redemptive plan. Through Abraham, blessing will flow to the nations. Scattered peoples will be gathered.

From the beginning, God’s purpose is not merely to save individuals, but to form a people—a renewed humanity drawn from every tribe and tongue, united not around self, but around him.

That promise runs through the whole of Scripture, finding its fulfilment in Jesus.

Jesus and the Reunification of Humanity

In Ephesians 2, the apostle Paul gives us a window into what Jesus has accomplished:

“He himself is our peace… his purpose was to create in himself one new humanity… thus making peace.” (Ephesians 2:14–15)

Through the cross, Jesus does more than reconcile individuals to God. He breaks down the dividing walls that separate people from one another. Jew and Gentile—once divided—are brought together into one new humanity.

This is the heart of redemption: not just vertical reconciliation (us with God), but horizontal reconciliation (us with one another). A new people is formed, united in Christ.

And crucially, Paul tells us how this new humanity lives:

“In him you too are being built together to become a dwelling in which God lives by his Spirit.” (Ephesians 2:22)

The Spirit is not an optional extra here. He is the one who indwells this new community, making the church the dwelling place of God.

Pentecost: The Reversal of Babel

Now we can return to Acts with fresh eyes.

At Pentecost, the Holy Spirit is poured out, and something remarkable happens: people from different nations hear the gospel in their own languages (Acts 2).

This is not random. It is deeply symbolic.

At Babel, language divides and scatters. At Pentecost, language becomes the means by which God gathers. The confusion of Babel begins to be undone—not by erasing difference, but by uniting diverse peoples in a shared confession of Christ.

Pentecost marks the launch of God’s reunification project.

The Spirit empowers the church not just to say something, but to become something: a living sign of God’s new humanity.

The True Scope of the Spirit’s Mission

So, what is the mission of the Holy Spirit?

Yes, he empowers witness. But more than that, he is creating a people—a new city, a new humanity, a new community centred on Christ.

Acts 1:8 is not just about activity; it is about identity. The Spirit sends the church across boundaries—geographical, cultural, social—not simply to expand influence, but to gather a people who embody the unity of the gospel.

This changes how we hear the verse.

It is not a call to perform or to become something we are not. It is an invitation to participate in what God is already doing: drawing people from every background into one family, with Christ at the centre.

Implications for the Church

When we grasp this, it reshapes everything.

1. Unity is central, not optional
The goal of mission is a unified people around Jesus. This gives new weight to Jesus’ words:

“By this everyone will know that you are my disciples, if you love one another.” (John 13:35)

Our life together is not incidental to mission—it is integral to it. A divided church contradicts the very message it proclaims.

2. The Spirit’s work is bigger than our experiences
In some contexts, the work of the Spirit is reduced to personal feelings or intense moments in gatherings. While the Spirit certainly engages our hearts, his mission is far larger than our experiences.

He is forming a people, not just creating moments.

When experience becomes the goal, we risk missing the deeper work of building a Christ-centred community that reflects the gospel.

3. Mission belongs to all of us
Mission is not the preserve of a few enthusiastic individuals. It is the calling of the whole church.

The Spirit empowers us—together—to participate in God’s redemptive plan. Whether across the street or across the world, we are caught up in the same story: the gathering of a people for God.

4. The gospel confronts division at every level
If the Spirit’s mission is to form a unified people, then anything that fractures that unity—racial prejudice, social division, personal rivalry—must be taken seriously.

This isn’t driven by cultural pressure, but by gospel conviction. The church is meant to be a foretaste of the reconciled humanity God is creating.

A Bigger Vision

Many of us have too small a view of the work of the Holy Spirit.

We think in terms of personal empowerment or spiritual experience, but the Bible invites us to see something far more expansive. The Spirit is at work across history, gathering a people, building a dwelling place for God, forming a new city with Christ at the centre.

The final picture of that city is given in Revelation 7: a vast multitude from every nation, tribe, people, and language, united in worship around the throne of God.

That is where the story is heading.

And the Holy Spirit is the one who gets us there.