What is the Trinity and why does it matter?

The Trinity is the teaching that there is one God who eternally exists in three distinct persons: Father, Son, and Holy Spirit — each fully God, yet there is only one God, not three.

It matters because it shapes how we understand salvation itself: the Father sends the Son (John 3:16), the Son accomplishes redemption through His death and resurrection (Romans 5:8), and the Holy Spirit applies that redemption to believers, indwelling and transforming them (Titus 3:5). It also reveals that God is inherently relational and loving within His own being, prior to and apart from creation (John 17:24).

While the Trinity is beyond full human comprehension, it's not a contradiction — it doesn't say God is one and three in the same sense, but one in essence and three in person.