"Repentance" automatically leads to some major questions
For what do I need God? (Relational vs. Mechanical Universe Views)
What kind of help can I expect from God? (Faith can only "expect" what has been promised)
Simple categories made complex by multitudinous variations: 1 John 2:16 and 2:25 in light of 2 Peter 1:3-4.
A four-fold presentation of the Person we call Jesus: the three earliest "synoptics" and the one later "unique" record.
Approach:
The repetitious four-fold presentation argues for a significant "Truth".
Different authors mean different points of focus (same "Truth", just different emphases upon the significance of that "Truth" in terms of the persons doing the presenting).
Matthew -- the turncoat tax farmer (Matthew 10:3); a thorough-going materialist
Mark -- the dropout missionary (Acts 13:13 compared with 15:38); a fear-driven egoist (Mark 16:8)
Luke -- the loyal physician (Colossians 4:14); a severely limited man (Luke 8:43).
John -- the bombastic "son of thunder" (Mark 3:17); an unlovable agitator (John 13:23; 19:26; 20:2; 21:7) who, with his brother, tried to preempt the other disciples in order to obtain one of the positions of power in the Kingdom (Mark 10:35 and 10:41).
Each author viewed Jesus as the "solution" to his "problem area".
Even when the view is a "shared" view, the specific vocabulary is deliberate [Note Mark's use of "Satan" in 1:13 vs. Matthew's (4:1) and Luke's (4:2) use of "devil" in the "temptation" accounts; also note Mark's "driven" in 1:12 vs. "led" in Matthew 4:1 and Luke 4:1].
Matthew presented Jesus as the Lion of Judah; the Son of Abraham.
Mark presented Jesus as the Ox of God; the Son of God.
Luke presented Jesus as the Man of God; the Son of Man.
John presented Jesus as the Eagle of Heaven; the Son of God.
A short case study: John 20:30-31
John, the apostle of "Life" begins his presentation of Jesus as the Eternal Expression of the Glory of God (the Eternal Word became flesh so that we might behold His glory). As such there is no "temptation" account in his record (God cannot be tempted by evil).
John's initial evidence of his thesis that "Life" can be had through faith in Jesus is the miracle of changing water to wine at a wedding feast when His "hour" was still to come (was that "hour" His own wedding feast??). This was to "prove" that Jesus could provide the Joy of Life.
One of the major obstacles to the Joy of Life is the reality of Death, but as the Eagle of Heaven; Death is "swallowed up" just as Isaiah 25:6-8 and 1 Corinthians 15:54 say.
The major "glory" on display is the "Love of God" coupled to the "Power of Resurrection". John 3:16 is in no other "Gospel" and follows on the heels of the Water to Wine "proof"; nor is John 11:25 in any other "Gospel" (set in the context of weeping and grief) and it is the prelude to the last great "sign" before the Cross.
John saw the Love (the only disciple at the Cross) and the Power (first, with Peter, to confirm the resurrection).
John wrote his "Gospel" to present the King of Heaven as the answer to the grief of Death for all who will believe.
