Incarnation

For Christians, Jesus Christ is the incarnation of God on Earth. Christians believe that God chose to reveal himself as a human being to spread his teaching, to teach humans how to live good lives by following his laws, and to offer human beings the chance of salvation. This is expressed in the Bible in the Gospel of John:

The Word became flesh and made his dwelling among us. (John 1:14)

The Gospel of Luke (1:26–35) tells how the Virgin Mary is visited by the Angel Gabriel, who announces to her that she will become pregnant through the Holy Spirit:

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Do not be afraid, Mary, you have found favour with God. You will conceive and give birth to a son, and you are to call him Jesus. He will be great and will be called the Son of the Most HighLuke 1:30–2

This event is often referred to as the annunciation.

Jesus’ birth is believed to have been a miracle, because Mary was a virgin and was made pregnant through the Holy Spirit. Jesus had no biological father on Earth. Mary’s husband, Joseph, can be seen as Jesus’ earthly stepfather.

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Christians celebrate the incarnation of Jesus at Christmas.
Question

Why was Jesus’ birth miraculous?

Because his mother, Mary, became pregnant by the Holy Spirit, which means that Jesus did not have a human father. Jesus’ father is God.