What Is Trinity?
The Trinity is the teaching that sums up the Christian understanding of God: the one God exists in three persons, Father, Son and Holy Spirit. The term itself does not appear in the Bible; the doctrine arose from reading the texts together. Scripture insists on God's oneness ('Hear, Israel: the LORD is our God. The LORD is one.'), while the New Testament, naming the Father as God, also ascribes divine identity and work to the Son and the Spirit: John writes that the Word was with God in the beginning and was God; Jesus sends his disciples to baptize 'in the name of the Father and of the Son and of the Holy Spirit'; Paul's blessing sets the three side by side. The churches of the first centuries voiced this testimony in the formula 'one essence, three persons'. The doctrine is not a mathematical riddle but a summary of God's self-disclosure; in Christian understanding, the depth of 'God is love' is sought in this relational oneness.