The Trinity in the Bible teaches that one God exists eternally as three persons—Father, Son, and Holy Spirit. While the word 'trinity' does not appear in Scripture, the trinity doctrine emerges clearly from passages like Matthew 28:19 where Jesus commands baptism in the name of the Father, Son, and Holy Spirit. The Godhead is described in Colossians 2:9 as the fullness of deity dwelling bodily in Christ. The Nicene Creed (325 AD) formalized the church's understanding: the triune God is three in one, each person coequal and coeternal. The Father creates, the Son redeems, and the Holy Spirit sanctifies, yet they share one divine nature. This is not three gods (tritheism) but one God in three persons—a mystery that transcends human comprehension yet is foundational to Christian worship.