What does John 1:13 mean?
This is John's first mention of being "born" into the kingdom of God. The term "born again" has become a cliché, and many people misunderstand it. The term is important because of what it implies.When a child is born, virtually all effort, energy, and pain is endured by the mother, not the child. She changes very little. And yet, the child experiences a great deal of change. Salvation is much the same: God's pain and effort result in our benefit. He, of course, does not change at all in the process; but those who are saved change greatly. Saying that this does not occur "of blood" means it is not a natural occurrence. Saying that it is not "of the will of the flesh" means it is not a matter of human decisions. This rebirth is entirely the work of God, and according to His will (Ephesians 1:5). Our salvation is not dependent on anything in our human nature. This is good, because if it were, we'd all be lost forever (Titus 3:4–5)!
Jesus will clarify this concept during His conversation with Nicodemus, in John chapter 3.
John 1:1–18 is a poetic introduction of Jesus Christ. Jesus is referred to using the Greek word logos, meaning "the Word." This passage clearly describes Jesus as God, and co-creator with God the Father. These verses summarize Jesus' ministry and mission on Earth. The passage also explains how John the Baptist—a different John from the author of this gospel—was sent ahead of Christ to prepare for His arrival.
The first chapter of John introduces Jesus as "the Word," from the Greek logos. This chapter clearly describes Jesus as God. After this prologue, the chapter describes Jesus recruiting the first of His disciples, as well as a conversation between John the Baptist and the Pharisees. There are seven names or titles for Christ in this chapter, including "the Son of God," "the Word," and "the King of Israel."