God the Son was sent to Earth in human form to save humans. His death on the cross was a sacrifice for the sins of humanity which allows them to be reunited with God. Jesus Christ is the incarnationThe belief that God took human form in Jesus Christ. It is also the belief that God in Christ is active in the Church and in the world. of God on Earth:
The Word became flesh and made his dwelling among us
— John 1:14
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Jesus Christ was both fully divine and fully human. This means he was fully God, as well as fully human