One of the characteristics of John's Gospel is the two-fold choice of:
- no parables
- much metaphor that confused the listeners. See appendix below.
While the use of metaphors is not unique to John, John uses and records them far more that other writers.
In the particular instance pointed out by the OP, Jesus is making a clear distinction between those "born of God" or "born from above" vs those who are "born of the devil". Both appear in John.
Born of God
- John 1:12, 13 - But to all who did receive Him, to those who believed in His name, He gave the right to become children of God— children born not of blood, nor of the desire or will of man, but born of God.
- John 3:3-8 - Jesus replied, “Truly, truly, I tell you, no one can see the kingdom of God unless he is born again/from above”. “How can a man be born when he is old?” Nicodemus asked. “Can he enter his mother’s womb a second time to be born?” Jesus answered, “Truly, truly, I tell you, no one can enter the kingdom of God unless he is born of water and the Spirit. Flesh is born of flesh, but spirit is born of the Spirit. Do not be amazed that I said, ‘You must be born again/from above.’ The wind blows where it wishes. You hear its sound, but you do not know where it comes from or where it is going. So it is with everyone born of the Spirit.”
Jesus is here distinguishing between natural birth (of the flesh) and being re-born spiritually, "of water", "of Spirit", "from above/again" which, here, are all equivalent.
Born of the Devil
- John 8:44 - You belong to your father, the devil, and you want to carry out his desires. He was a murderer from the beginning, refusing to uphold the truth, because there is no truth in him. When he lies, he speaks his native language, because he is a liar and the father of lies.
Thus, Jesus teaching is again about our spiritual life - are we born of God and so are "children of God" (1 John 3:1, 2, 10, 5:2, Rom 8:16, 9:8, Phil 2:15, etc), or children of the devil? It is our spiritual life that shows this distinction.
Paul makes the same distinction in 2 Cor 5:17 -
Therefore if anyone is in Christ, he is a new creation.a The old has
passed away. Behold, the new has come!
APPENDIX - Metaphors in John
Here is a partial list of the many metaphors used in the Gospel of John, some of which were questioned by authorities:
- 1:1-5 – Jesus is the “Word”, life and light. (See Gen 1:1-4)
- 1:1-14 – Jesus is the “Word” (Greek: “logos” means idea or principle)
- 1:29, 36 – Jesus is the Lamb of God (see Gen 22:8)
- 1:51 – Jesus is the ladder between earth and heaven (Gen 28:12)
- 2:19-21 – Jesus’ body is the temple that was to be destroyed and raised in 3 days
- 3:3-12 – Jesus’ disciples must be born from above
- 3:13, 14 – Jesus is the bronze serpent in the wilderness (also 8:27, 12:34 & Num 21:9)
- 4:13, 14, 7:38 – Jesus’ message becomes a fountain/river of living water flowing out of His disciples. (See Eze 47:1-12, Rev 22:1, 2)
- 4:32 – Jesus’ food was not of this world, ie, conversions to discipleship (recall Manna of Ex 16)
- 4:35-38 – Jesus’ disciples must reap the “harvest” of the Gospel
- 5:13, 14 – Our work is to labour for “manna” or “food” that endures (also, 6:27)
- 5:35 – John the Baptist was a lamp preparing for the greater light
- 6:35, 41, 48, 50, 51 – Jesus said, “I am the bread of life” (See Ex 16 about Manna)
- 6:53-58 – we must eat Jesus’ flesh and drink His blood
- 8:12 (and 1:4, 9, 12:46) – Jesus said, “I am the light of the world” (see Ps 27:1, 18:28, Micah 7:8, Isa 60:19)
- 8:38-47 – Jesus’ disciples are Abraham’s children and children of God, whereas, His enemies are children of the devil.
- 9:39-41 – converted disciples are not blind but those who will not see are blind
- 10:1-18 – Jesus said, “I am the good Shepherd” (v11, 14) and the disciples are sheep (see Psalm 23:1; Eze 34:11ff, Isa 40:11)
- 10:8 – Jesus said, “I am the gate/door to the sheep”
- 10:30 – “I and the Father are one.” – appears to evoke the Shema in Deut 6:4 but expands upon it. Jesus was then accused of blasphemy.
- 11:25 – Jesus said, “I am the resurrection and life”
- 12:24 – Jesus compares his life to a seed that must die to produce more life
- 14:6 – Jesus said, “I am the way the truth and the life”
- 14:26 – Holy Spirit is called an advocate (Greek: “parakletos”) (see also 15:26ff)
- 15:1-5 – Jesus said, “I am the vine and you are the branches” (see Isa 5:1ff, Jer 12:10)
- 16:21, 22 – troubles of this life compared to child birth
- 18:11 – Jesus’ trials likened to a “cup”
- 21:15-17 – Jesus’ followers likened to lambs and sheep (see also 10:1-18)