Christian Beliefs: God, Creation and Jesus
The Trinity: One God in Three Persons
Christianity teaches that there is one God who exists eternally as three distinct Persons: Father, Son and Holy Spirit. This is the doctrine of the Trinity. The three Persons are not three separate gods (polytheism) nor three modes of one God (modalism) — they are one God in a communion of being and love.
The Nicene Creed (325/381 CE) is Christianity’s most widely accepted doctrinal statement. It confesses the Father as creator of all things, the Son as “God from God, Light from Light, true God from true God,” and the Holy Spirit as “the Lord, the giver of life.” The Creed is used across Catholic, Orthodox and most mainline Protestant traditions, making it the closest thing to a universal Christian statement of belief.
Matthew 3:13–17 (the baptism of Jesus) shows all three Persons simultaneously: Jesus is baptised in the Jordan, the Holy Spirit descends as a dove, and the Father speaks from heaven — “This is my beloved Son.”
The Nicene Creed was agreed at Nicaea (325 CE) and Constantinople (381 CE). It is shared by Catholic, Orthodox and most Protestant churches. Matthew 3:13–17 is the key scriptural showing of all three Persons at once.
Creation: God and the Universe
Genesis 1–3 is the foundational Christian text on creation. Genesis 1 presents creation as six days of ordered making, culminating in humanity as the pinnacle. Genesis 2 gives a second, more intimate account focused on the first humans and their relationship with God. Genesis 3 introduces the Fall.
Christians interpret Genesis in divergent ways. A literal reading takes the six days as historical days. A metaphorical reading treats Genesis as theological poetry that conveys truths about God’s nature (creative, purposeful, benevolent) rather than a scientific sequence. John 1:1–18 adds the dimension that creation happened ‘through the Word’ — the eternal Son was the agent through whom all things were made, “and without him not one thing came into being.”
The Incarnation: God Becomes Human
The Incarnation is the belief that the second Person of the Trinity, the eternal Son (the Word or Logos), became human in the person of Jesus. John 1:14 states: “And the Word became flesh and lived among us.” 1 Timothy 3:16 calls this “the mystery of our religion” — God was manifested in flesh.
The Incarnation has enormous implications. It means Jesus is not merely a great teacher or prophet: he is the eternal God of the universe who chose to live a human life, to suffer and die. For Christians, this act of divine self-giving is the greatest expression of God’s love.
The Council of Chalcedon (451 CE) defined Jesus as “truly God and truly man,” with two natures in one Person. Catholic, Orthodox and most mainline Protestant churches affirm this. Some liberal Protestant theologians read the Incarnation as metaphorical — describing God’s deepest engagement with humanity rather than a literal metaphysical event. The Nicene Creed is the common anchor: “For us and for our salvation he came down from heaven... and was made man.”
The Last Days of Jesus
Luke 22–24 contains the account of Jesus’ last days. The sequence is: the Last Supper (Jesus shares bread and wine with his disciples, saying “This is my body given for you” and “This cup is the new covenant in my blood”); betrayal and arrest in Gethsemane; trial before the High Priest and Pilate; crucifixion on Golgotha; burial and then resurrection (the empty tomb and appearances to Mary, to the disciples on the Emmaus road, and to the eleven).
The Last Supper is the foundation of the Eucharist practised in churches today. The crucifixion and resurrection are together the central event of Christian history — the moment of salvation.
Salvation and Atonement
Salvation is the rescue of humanity from sin. Christians teach that sin — human rebellion against God’s will — separates humanity from God. Jesus’ death on the cross is understood as the means by which that separation is overcome.
Atonement theories explain how the cross achieves salvation. John 3:16 states: “God so loved the world that he gave his only Son, so that everyone who believes in him may not perish but may have eternal life.” Acts 4:8–12 records Peter asserting that “there is salvation in no one else” but Jesus Christ — a foundational claim about the uniqueness of Christ’s saving work.
John 3:16 — “God so loved the world that he gave his only Son” — is the key salvation verse. Acts 4:8–12 — Peter declares salvation is found in Christ alone. Both are essential 5-mark source references on salvation.
Christians agree that the cross achieves salvation but differ on how. Substitutionary atonement (popular in Reformed/evangelical Christianity): Jesus took humanity’s punishment in their place. Moral influence theory (associated with liberal Protestantism): the cross demonstrates God’s love so powerfully that it draws humanity to repentance. Christus Victor (common in Orthodox thinking): Jesus defeated the powers of sin, death and evil by dying and rising. All three agree that salvation comes through Christ; they differ on the mechanism.