God and authority in the Catholic ChurchThe Trinity

The Bible is a central source of authority for Catholics and reveals many important teachings. Catholics also respect the authority, leadership and teaching of the Pope.

Part ofReligious StudiesCatholic Christianity

The Trinity

Like other Christians, Catholics believe in one God but they believe he exists in three parts or ‘persons’. These are the Father, the Son and the Holy Spirit, known collectively as the . The three parts of God are referred to as:

  • God the Father - the ultimate creator of all life. Christians believe that in the same way a parent cares for their child, God cares about his creation and wants to protect everything in it.
  • God the Son, also known as - a key Christian belief is that God sent his only son Jesus to Earth as a Jesus' death made up for the sins of humans, and gave humans the chance for and life in . The and of Jesus prove to Christians that he is the Son of God.
  • God the Holy Spirit - the presence of God in the world, often represented as a dove. The Holy Spirit helps Christians to understand the idea that God is always present in the world, as stated in the Gospel of John: I will ask the Father, and he will give you another advocate to help you and be with you for ever - the Spirit of truth (John 14:16-17). The Holy Spirit is considered to be a source of strength, courage and wisdom by many Christians.
A triangular diagram to explain the Trinity, with God labelled in the centre, and the three distinct parts labelled on each corner - The Father, The Son, The Holy Spirit.

Christians find the first mention of the Trinity in as part of the creation story, in which all three persons of the Trinity have a role. Belief in the Trinity is affirmed in the , the statement of key religious beliefs that is often recited by worshippers during Christian ceremonies:

We believe in one God, the Father, the Almighty, maker of heaven and earth. … We believe in One Lord, Jesus Christ, the only Son of God … of one Being with the Father … [who] was made man … he suffered death and … he rose again. … We believe in the Holy Spirit … the giver of life, who proceeds from the Father and the Son … who has spoken through the prophets.
From the Nicene Creed

How the Trinity is reflected in belief and worship

  • When Catholics use the sign of the cross to bless themselves, they do so in the name of the Father, the Son and the Holy Spirit.
  • Some of the that are sung at mention the Trinity.
  • The Trinity is referred to during some of the Catholic , including . The Gospel of Matthew describes the three persons of the Trinity being present together at Jesus' own baptism:
As soon as Jesus was baptised, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him. And a voice from heaven said, ‘This is my Son, whom I love; with him I am well pleased.’
Matthew 3: 16-17

The development of the Trinity doctrine

  • The term ‘Trinity’ was first used in the 2nd century by Theophilus of Antioch, a to Christianity. However, Theophilus did not use the words ‘Father’, ‘Son’ or ‘Holy Spirit’.
  • The First Council of Nicaea, formed in AD 325, was a group of who were based in what is now Turkey. They confirmed the use of the term ‘Trinity’, particularly regarding the ideas of God as Father and Son.
  • The First Council of Constantinople confirmed the nature and role of the Holy Spirit in AD 381.
  • This understanding of the Trinity as referring to God the Father, Son and Holy Spirit has continued to be a very important part of the Christian faith.