Trinity

In complete harmony and unity, God, Jesus, and the Holy Spirit are three separate persons in one Godhead.
The doctrine of the Trinity is complex for the human mind to comprehend. The Bible teaches that there is one God. The New Testament clearly teach three personal agents in the godhead at the baptism of Jesus. Jesus, in his last words before his ascension, told his disciples to baptize in the name of the Father, The Son, and the Holy Spirit. All three persons of the Godhead have distinct roles in the salvation of fallen sinners. God, the Father, from all eternity predestined sinners for salvation….. For he chose us in him before the creation of the world to be holy and blameless in his sight. In love he predestined us to be adopted as his sons through Jesus Christ, in accordance with his pleasure and will— (Ephesians 1:4-5). Jesus Christ, from all eternity, redeemed sinners by paying their sin debt….for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Christ Jesus. God presented him as a sacrifice of atonement,……(Romans 3:23-25). God, the Holy Spirit, quickens and makes spiritually dead sinners alive so they can respond to Jesus…..Jesus answered, "I tell you the truth, no one can enter the kingdom of God unless he is born of water and the Spirit. Flesh gives birth to flesh, but the Spirit gives birth to spirit. You should not be surprised at my saying, `You must be born again.' (John 3:5-7) (Also see Titus 3:5-7). J.I. Packer, in Concise Theology, says the following about two common heresies concerning the Trinity: They are not three roles played by one person (that is modalism), nor are they three gods in a cluster (that is tritheism). All non-Trinitarian formulations of the Christian message are, by biblical standards, inadequate and fundamentally false and will naturally tend to pull Christian lives out of shape.