What Is The Trinity?
The Trinity is the Christian teaching that God is one being who eternally exists as three distinct persons: Father, Son, and Holy Spirit.
Meaning
The Trinity is the doctrine that the one God of the Bible eternally exists as three distinct persons, the Father, the Son, and the Holy Spirit, who share one divine essence. It is a claim about God's inner nature: not three gods, and not one God wearing three different masks, but one God in three persons.
The word Trinity never appears in Scripture, but Christians point to passages that speak of Father, Son, and Spirit together as evidence for the pattern. Jesus instructs his followers to go and make disciples, baptizing them in the name of the Father and of the Son and of the Holy Spirit, using a single name for all three. The early church spent centuries working out the doctrine's precise language, formalizing it at councils like Nicaea in 325 CE and Constantinople in 381 CE in response to disputes over how to describe Jesus's relationship to the Father.
Virtually all major Christian traditions, Catholic, Orthodox, and the historic Protestant traditions, affirm the Trinity as core doctrine, though they have long-standing differences over technical details, such as the Eastern and Western church's disagreement over whether the Spirit proceeds from the Father alone or from the Father and the Son. Some smaller modern movements reject the doctrine altogether, but mainstream Christianity across nearly two thousand years has treated it as foundational to how God is understood.
In Scripture
Matthew 28:19“Go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,”
Explore more terms in the Christian glossary, see how the traditions understand it on the denominations guide, or read related verses explained.
The Trinity: Frequently Asked
Where does the word Trinity come from if it is not in the Bible?
The term was coined by early Christian writers, notably Tertullian around 200 CE, to summarize a pattern they saw throughout Scripture: Father, Son, and Spirit are each spoken of as fully God, yet the Bible insists there is only one God. The word organizes that biblical data; it does not add new information to it.
Is the Trinity the same as believing in three gods?
No, and Christian teaching is explicit about this distinction. The doctrine holds there is one God in essence, who exists eternally as three distinct persons in relationship. This is different from polytheism, many separate gods, and from modalism, one God appearing in three different modes at different times, both of which mainstream Christianity has historically rejected.
Do all Christians believe in the Trinity?
The overwhelming majority of Christian traditions, Catholic, Orthodox, and mainstream Protestant, affirm the Trinity as essential doctrine. A small number of modern movements, such as some Unitarian and other nontrinitarian groups, reject it. Belief in the Trinity has been treated as a defining marker of orthodox Christian identity since the fourth century.