World Religion: The doctrine of the trinity in Christianity

The word "Trinity" derives from the Latin name "trinitas" which means "three are one". It was first introduced by Tertullian at the end of the second century, but received wide acceptance in the fourth and fifth centuries.

The Trinity expresses the conviction that God is one made up of three distinct people who exist in equal measure essence and co-eternal communion like the Father, the Son and the Holy Spirit.

The doctrine or concept of the Trinity is central to most Christian confessions and faith groups, though not all of them. Churches that reject the Trinity doctrine include The Church of Jesus Christ of Latter-day Saints, Jehovah's Witnesses, Jehovah's Witnesses, Christian scientists, Unitarians, the Unification Church, the Christadelphians, the Pentecostals dell'Unità and others.

More information on faith groups that reject the Trinity.
The expression of the Trinity in Scripture
Although the term "Trinity" is not found in the Bible, many Bible scholars agree that its meaning is clearly expressed. Throughout the Bible, God is presented as Father, Son and Holy Spirit. It is not three gods, but three people in the one and only God.

The Biblical Dictionary of Tyndale states: “The scriptures present the Father as the source of creation, the giver of life and God of the whole universe. The Son is depicted as the image of the invisible God, the exact representation of his being and his nature, and the Redeeming Messiah. The Spirit is God in action, God who reaches out to people - influencing them, regenerating them, filling them and guiding them. All three are a trinity, inhabiting each other and working together to bring about divine design in the universe. ”

Here are some key verses that express the concept of Trinity:

Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit ... (Matthew 28:19, ESV)
[Jesus said:] "But when the Assistant comes, I will send you from the Father, the Spirit of truth, who proceeds from the Father, he will bear witness to me" (John 15:26, ESV)
The grace of the Lord Jesus Christ and the love of God and the brotherhood of the Holy Spirit are with you all. (2 Corinthians 13:14, ESV)
The nature of God as Father, Son and Holy Spirit can be clearly seen in these two great events in the Gospels:

The baptism of Jesus - Jesus came to John the Baptist to be baptized. As Jesus rose from the water, the sky opened and the Spirit of God, like a dove, descended on him. The witnesses of the baptism listened to a voice from heaven saying: "This is my son, whom I love, I am very happy with him". The Father clearly announced the identity of Jesus and the Holy Spirit descended on Jesus, empowering him to begin his ministry.
The transfiguration of Jesus - Jesus took Peter, James and John to the top of a mountain to pray, but the three disciples fell asleep. When they awoke, they were amazed to see Jesus talking to Moses and Elijah. Jesus was transformed. His face shone like the sun and his clothes dazzled. Then a voice from heaven said: “This is my beloved Son, of whom I am very pleased; listen to it". At that time, the disciples did not fully understand the event, but today readers of the Bible can clearly see God the Father directly and strongly linked to Jesus in this story.
Other verses from the Bible expressing the Trinity
Genesis 1:26, Genesis 3:22, Deuteronomy 6: 4, Matthew 3: 16-17, John 1:18, John 10:30, John 14: 16-17, John 17:11 and 21, 1 Corinthians 12: 4–6, 2 Corinthians 13:14, Acts 2: 32-33, Galatians 4: 6, Ephesians 4: 4–6, 1 Peter 1: 2.

Trinity symbols
Trinità (Anelli Borromei) - Discover the Borromei rings, three intertwined circles that symbolize the trinity.
Trinity (Triquetra): discover the triquetra, a three-piece fish symbol that symbolizes the trinity.