John wrote his Gospel account “so that [we] may come to believe that Jesus is the Messiah, and that by believing, [we] may have life in his name.” John doesn’t explicitly tell this to the reader until the end of the book (John 20:31). But right at the beginning, he communicates his intentions through literary devices. John introduces Jesus as the word that spoke all life into being and as the light of the world. By repeating words and metaphors from the first pages of Genesis, John compares Jesus’ ministry to the very beginning of all creation. He then continues to weave echoes of Genesis throughout his account in order to help readers see how Jesus is the giver of new creation life.
Read: John 1:1-14
Not only is Jesus the Messiah, but he's also the son of God who gives eternal life to everyone who believes in his name. We see this reality through the signs and miracles he performs. And when people question if he’s the son of God, seven times Jesus responds, "I Am."
John emphasizes Jesus’ unique ability to give eternal life—something only God has the authority to do. He also introduces people to a new life in him. By believing that he is the Messiah and God's son, they have eternal life and freedom from sin and are empowered to perform radical acts of kindness, generosity, and selfless love as they live according to God’s Kingdom.
The Gospel of John emphasizes Jesus as God incarnate and the reality to which the entire biblical story points. John emphasizes this with his opening passages that states that Jesus was with God at creation and that Jesus is God. It's a bold statement, and John spends the rest of his Gospel account emphasizing Jesus' identity as God in human form.