The Trinity: God in Three Persons

1. Introducing the mystery of the Trinity
Implicit, not explicit -
"God is three persons,
Each person is fully God,
There is one God."

2. The Biblical evidence for the Trinity

Old Testament:
The unity of the Godhead (Deut 6:4-9 Isaiah 43:10-13)
The plurality of the Godhead (Gen 1:1-2;26 Isaiah 6:8)

New Testament:
Jesus - "I and the Father are one" (John 10:30)
Birth of Jesus
Preaching of John the Baptist (Matt 3:1-17)
Baptism of Jesus (Matt 3:13-17)
Commissioning of disciples (Matt 28:16-20)
Preaching at Pentecost (Acts 2:32-33)
Apostolic Benedictions (2 Cor 13:14 2 Thess 2:13f)

3. So What?