In Trinitarian doctrine, God exists as three persons or hypostases, but is one being, having a single divine nature. The members of the Trinity are co-equal and co-eternal, one in essence, nature, power, action, and will. As stated in the Athanasian Creed, the Father is uncreated, the Son is uncreated, and the Holy Spirit is uncreated, and all three are eternal without beginning. "The Father and the Son and the Holy Spirit" are not names for different parts of God, but one name for God because three persons exist in God as one entity. They cannot be separate from one another. Each person is understood as having the identical essence or nature, not merely similar nature.

Jesus(c.?4 BC – c.?AD 30 / 33), also referred to as Jesus of Nazareth and Jesus Christ,was a first-century Jewish preacher and religious leader.He is the central figure of Christianity and is widely described as the most influential person in history. The fundamental belief in Christianity is that, He is the incarnation of God the Father and the awaited Messiah (Christ) prophesied in the Old Testament and He is one substance of The Trinty (The Father,The Son and The Holly Spirit).

THE BIRTH OF JESUS CHRIST

The birth of Jesus is celebrated annually on January 7th by Eastern Churches (on December 25th by Western churches) as Christmas. His crucifixion is honored on Good Friday and his resurrection on Easter Sunday. The widely used calendar era "AD", from the Latin anno Domini ("in the year of the Lord"), and the equivalent alternative "CE", are based on the approximate birthdate of Jesus.

HIS MISSION

Virtually all modern scholars of antiquity agree that Jesus existed historically.Jesus was a Galilean Jew who was baptized by John the Baptist and began his own ministry. He preached orally and was often referred to as "rabbi".Jesus debated with fellow Jews on how to best follow God, engaged in healings, taught in parables and gathered followers.He was arrested and tried by the Jewish authorities,turned over to the Roman government, and crucified on the order of Pontius Pilate, the Roman prefect.After his death,he rose from the dead, and the community,his followers formed,eventually became the early Church.

The prologue to the Gospel of John identifies Jesus as an incarnation of the divine Word (Logos).As the Word, Jesus was eternally present with God, active in all creation, and the source of humanity's moral and spiritual nature.Jesus is not only greater than any past human prophet but greater than any prophet could be. He not only speaks God's Word; he is God's Word. In the Gospel of John, Jesus reveals his divine role publicly. Here he is the Bread of Life, the Light of the World, the True Vine and more.

Near the beginning of his ministry, Jesus appoints twelve apostles.
In Matthew and Mark, despite Jesus only briefly requesting that they join him, Jesus' first four apostles, who were fishermen, are described as immediately consenting, and abandoning their nets and boats to do so (Matthew 4:18–22) and Mark 1:16–20.
In John, Jesus' first two apostles were disciples of John the Baptist. The Baptist sees Jesus and calls him the Lamb of God; the two hear this and follow Jesus.In addition to the Twelve Apostles, the opening of the passage of the Sermon on the Plain identifies a much larger group of people as disciples (Luke 6:17). Also, in Luke 10:1–16 Jesus sends seventy or seventy-two of his followers in pairs to prepare towns for his prospective visit. They are instructed to accept hospitality, heal the sick and spread the word that the Kingdom of God is coming.