Teaching · 11 October 2026
The Holy Spirit: The Third Person of the Blessed Trinity
True God with the Father and the Son — the Lord and giver of life, who makes us holy.
1. Who Is the Holy Spirit?
The Holy Spirit is the Third Person of the Blessed Trinity, true God, equal to the Father and the Son in divinity, majesty and eternity. Christians believe in one God in three distinct Persons: the Father, the Son and the Holy Spirit. They are not three gods, but one God. The Holy Spirit is not an impersonal force but a divine Person who teaches, guides, loves, sanctifies and gives life. Jesus commanded His disciples to baptise all nations “in the name of the Father and of the Son and of the Holy Spirit” (Matthew 28:19).
2. The Holy Spirit in the History of Salvation
The Holy Spirit is present throughout the history of salvation. In Creation: The Spirit of God moves over the waters (Genesis 1:2), revealing His life-giving presence. In the Old Testament: He inspires the prophets and strengthens God’s servants. In the life of Jesus: Jesus is conceived by the power of the Holy Spirit (Luke 1:35) and anointed for His mission (Luke 4:18). At Pentecost: The Spirit descends upon the Apostles, empowering them to proclaim the Gospel boldly (Acts 2:1–4). In the Church: He guides the faithful into truth, sanctifies believers and strengthens the Church’s mission (John 16:13).
3. The Relationship of the Holy Spirit with the Father and the Son
The Holy Spirit proceeds eternally from the Father and the Son, sharing fully in the one divine nature. The Father, the Son and the Holy Spirit are distinct Persons, yet inseparably united in one Godhead. The Holy Spirit is called the Spirit of the Father (Matthew 10:20) and the Spirit of the Son (Galatians 4:6). He is neither created nor inferior to the Father and the Son.
4. Names and Symbols of the Holy Spirit
The Holy Spirit is called the Advocate or Paraclete, who teaches and guides us (John 14:26), and the Spirit of Truth, who leads us into truth (John 16:13).
Scripture also uses symbols to reveal His activity: water signifies spiritual life (John 7:37–39); fire represents purification and empowerment (Acts 2:3); the dove recalls His descent at Jesus’ baptism (Matthew 3:16); and wind signifies His mysterious, life-giving power (John 3:8).
5. The Work of the Holy Spirit in the Christian Life
The Holy Spirit makes us holy and strengthens us to live as children of God. He helps us to pray (Romans 8:26), understand God’s Word, grow in faith and remain united to Christ and His Church. He also distributes spiritual gifts for the service of others and the building up of the Church (1 Corinthians 12:4–11). Isaiah 11:2–3 traditionally provides the biblical basis for the seven gifts of the Holy Spirit: wisdom, understanding, counsel, fortitude, knowledge, piety and fear of the Lord. Saint Paul identifies the fruits of the Spirit as love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control (Galatians 5:22–23). These virtues demonstrate that we are allowing the Spirit to transform our lives.
6. How Should We Respond to the Holy Spirit?
Every Christian should cultivate a living relationship with the Holy Spirit by praying daily, meditating on God’s Word, participating faithfully in the sacraments, resisting sin and using personal gifts to serve others. We must also discern our inspirations in the light of Scripture and the teaching of the Church. Our response should be evident in practical love, reconciliation, justice, peace and service to the poor and vulnerable. Saint Paul warns us: “Do not stifle the Spirit” (1 Thessalonians 5:19).
Conclusion
The Holy Spirit is the Lord and giver of life, who unites us to Christ, forms us into God’s holy people and empowers us to bear witness to the Gospel. To believe in Him is not merely to know about Him, but to welcome His presence and cooperate with His grace. The essential question is not simply whether we have received the Holy Spirit, but whether we allow Him to transform our lives and make us faithful witnesses of Christ’s love.