In the Catholic Faith, The Holy Trinity is the term used to denote that God, Who is one unique being, exists as Three Persons, the Father, the Son and the Holy Spirit, distinct from one another. The actual term “Trinity” is first found around 180 AD as Theophilus of Antioch speaks of “the Trinity of God, His Word and His Wisdom.”
“The grace of the Lord Jesus Christ, the love of God, and the communion of the Holy Spirit be with all of you.” (2 Corinthians 13:14)
What is the Trinity? Fr. John Parks Explains (4:11)
The Trinity is an essential truth of what Catholics believe. Throughout Scripture, the Three Persons are most often referred to separately. For example, Jesus refers to His relationship with His Father in the St. Matthew’s Gospel: “Everything has been given over to Me by My Father. No one knows the Son but the Father, and no one knows the Father but the Son — and anyone to whom the Son wishes to reveal Him.” Jesus, God the Son, later promises to send the Holy Spirit. After His resurrection, the Son of God tells His disciples, “…Go, therefore, and make disciples of all nations. Baptize them in the Name of the Father, and of the Son, and of the Holy Spirit.”
St. John expresses the oneness of the work of the Father and the Son: “For whatever the Father does, the Son does likewise.” He goes on to explain all the works that the Father shares with the Son and expresses their unity: “The Father and I are one.” In regards to the Holy Spirit, Jesus says: “When He comes, however, being the Spirit of Truth, He will guide you to all Truth. He will not speak on His own, but will speak only what He hears.”.
The Trinity — the Father, the Son and the Holy Spirit — are one and yet, Three distinct Persons. “The Son is begotten of the Father and yet is not the Father is not the Son.” The Holy Spirit is distinct from the Father and the Son and yet has their divine nature. In the Gospels, Jesus teaches us that there is one God in Three Persons: God as Father, God as Son and God as Holy Spirit. Hence, the Holy Trinity.
Powerful Prayer to the Holy Trinity
Glory be to the Father, Who by His almighty power and love created me, making me in the image and likeness of God.
Glory be to the Son, Who by His Precious Blood delivered me from hell, and opened for me the gates of Heaven.
Glory be to the Holy Spirit, Who has sanctified me in the sacrament of Baptism, and continues to sanctify me by the graces I receive daily from His bounty.
Glory be to the Three adorable Persons of the Holy Trinity, now and forever.
Amen.