Written by What Moses, Isaiah, and John’s Own Gospel Actually Establish About Jesus’ Father
By Diesel the Magus | eFireTemple
October 25, 2026
I. THE OBJECTION THAT WILL NOT GO AWAY
Two passages repeatedly appear whenever the Father-of-Aša investigation approaches the question of divine identity.
John 5:46: Moses wrote about Jesus.
John 12:41: Isaiah saw Jesus’ glory.
From these statements comes a sweeping conclusion: Jesus and his Father must be identified with every portrayal of Yahweh throughout the Hebrew scriptures, and further inquiry into the Father’s identity is unnecessary.
But this argument moves too quickly.
It treats a witness as an unlimited endorsement. It treats an ancient prophetic vision and a later Gospel interpretation as though they were the same historical statement. And it overlooks something Jesus himself said about his followers:
They did not yet understand everything.
Jesus promised that the Advocate, the Spirit of Truth, would guide them into fuller understanding after his departure.
Before declaring the Father-of-Aša investigation defeated, we must therefore establish who was speaking, when the words were written, what the original passages meant, and precisely what the Gospel claims.
Those are not evasions.
They are the foundations of historical investigation.
II. MOSES WAS THE WITNESS
Begin with John 5:45, not verse 46.
Jesus tells his opponents that Moses, whom they trust, will accuse them.
Then he explains why.
Moses wrote about him, yet they refuse to believe him.
The logic is direct:
THEY CLAIM MOSES AS THEIR AUTHORITY.
MOSES TESTIFIES ABOUT JESUS.
THEY REJECT JESUS.
THEIR OWN AUTHORITY BECOMES THEIR ACCUSER.
Jesus is not merely pretending to respect Moses. He positively affirms that Mosaic writing testifies about him.
But that affirmation concerns a specific claim: Moses’ testimony about Jesus.
It does not say that every Mosaic provision expresses the original divine ideal.
It does not say that every divine act attributed within the Pentateuch must be understood in precisely the same way.
And it does not explicitly identify the Father Jesus knows with every later theological characterization of Yahweh.
The distinction is confirmed by Jesus’ treatment of divorce.
In Mark 10:5, Jesus explains a Mosaic precept as a concession to human hardness of heart. He then appeals to what was intended from the beginning.
JESUS COULD ACCEPT MOSAIC TESTIMONY WHILE DISTINGUISHING A MOSAIC CONCESSION FROM THE ORIGINAL IDEAL.
That distinction is not an invention of comparative theology.
It appears in Jesus’ own reported argument.
Nor should John 5 be confused with the separate resurrection debate in Mark 12.
Mark explicitly identifies those opponents as Sadducees. John 5 does not identify its opponents by that sectarian label.
Yet both encounters illustrate Jesus challenging religious opponents through scriptural authorities they recognize.
The immediate purpose is confrontation and correction—not blanket ratification.
III. ISAIAH 6 WAS NOT WRITTEN AS A COMPLETE PROPHECY ABOUT JESUS
Now read Isaiah 6 in its entirety.
The chapter begins in the year King Uzziah died.
Isaiah sees the enthroned Lord.
Seraphim proclaim divine holiness.
Isaiah acknowledges his unclean lips.
A burning coal touches his mouth.
He volunteers to become a messenger.
Then he receives a commission involving the people’s refusal to understand and the coming devastation of their land.
He asks how long the condition will continue.
The answer concerns ruined cities, deserted houses, population removal, and the survival of a remnant.
THAT IS THE CHAPTER’S HISTORICAL NARRATIVE.
It concerns Isaiah’s commission in the world of ancient Judah.
It is not, in its original setting, a thirteen-verse description of Jesus’ life.
The chapter does not explicitly name Jesus, the crucifixion, or the resurrection.
Its immediate horizon is the prophet’s own mission and the judgment facing his people.
When John later applies Isaiah’s words to the rejection of Jesus, he is making a theological interpretation of earlier scripture.
That interpretation may be important.
But it is not identical to the original historical setting.
A LATER APPLICATION DOES NOT ERASE AN EARLIER CONTEXT.
This matters most when John 12:41 is treated as if the eighth-century Isaiah had explicitly supplied the entire later Johannine account of Jesus and his Father.
He had not.
IV. THE TWO HISTORICAL LAYERS JOHN BRINGS TOGETHER
The composition of Isaiah creates an additional distinction.
John 12:38 quotes Isaiah 53:1.
John 12:40 quotes Isaiah 6:10.
Under the widely accepted historical-critical reconstruction, these passages belong to different stages in the composition of the book.
Isaiah 6 is associated with the earlier prophetic tradition rooted in the eighth century BCE.
Isaiah 53 belongs to the material commonly called Second Isaiah, generally associated with an anonymous sixth-century BCE prophetic author.
Joseph Blenkinsopp describes Second Isaiah as a later prophet historically associated with the name of Isaiah of Jerusalem.
Thus John draws from two different historical strata and presents their testimony under the received name Isaiah.
JOHN 12:38 — SECOND ISAIAH.
JOHN 12:40 — FIRST ISAIAH.
JOHN 12:41 — ONE COLLECTED PROPHETIC AUTHORITY.
The final book possesses literary unity, but literary unity does not require one historical author.
There is also a distinction between later authorship and intentional deception.
The evidence strongly supports the later composition of Isaiah 40–55. It does not, by itself, establish that its original anonymous author deliberately impersonated Isaiah of Jerusalem.
The writings may have acquired their shared attribution through collection and editorial transmission.
That process can produce historically misleading impressions of authorship without our being able to reconstruct every participant’s intention.
The consequence remains significant.
THE NAME OF AN ANCIENT PROPHET DOES NOT ESTABLISH THE DATE OR AUTHORSHIP OF EVERY PASSAGE COLLECTED UNDER THAT NAME.
And the historical setting of Second Isaiah becomes particularly important because it is the age of Cyrus and Persian contact.
V. THE PERSIAN-PERIOD CONNECTION
Second Isaiah is central to the Father-of-Aša investigation for reasons entirely independent of John 12:41.
Its Cyrus material belongs to the historical environment surrounding Persia’s rise and Babylon’s fall.
Isaiah 45 identifies Cyrus as Yahweh’s anointed and credits Yahweh with forming light, creating darkness, establishing peace, and creating calamity.
Morton Smith, writing in Encyclopaedia Iranica, argued that Second Isaiah used Persian material and answered questions raised in Yasna 44 by attributing creative acts to Yahweh.
Zarathustra’s Gathic tradition had already associated the ordering of reality with Ahura Mazda.
Second Isaiah’s claims consequently belong in a serious historical comparison.
This does not prove deliberate theft of a divine identity.
It does establish that the development of biblical creation theology cannot be investigated responsibly while ignoring the Persian-period environment.
The question of historical transmission remains open to examination, not closed by traditional prophetic attribution.
VI. NOW RETURN TO JOHN 12 — WHO IS ACTUALLY SPEAKING?
Here lies one of the most important distinctions in the entire discussion.
In John 12:35–36, Jesus addresses the crowd.
He urges them to walk while they have the light and to become children of light.
Then the narrative says he departed and hid himself.
The following verses change perspective.
John 12:37–43 is the narrator’s explanation of the unbelief Jesus encountered.
It is the narrator who quotes Isaiah 53.
It is the narrator who quotes Isaiah 6.
And it is the narrator who says Isaiah saw Jesus’ glory.
JOHN 12:41 IS NOT PRESENTED AS A DIRECT SAYING OF JESUS.
It belongs to the Gospel’s interpretation of Jesus’ ministry.
This does not automatically make the interpretation wrong.
Nor does it establish that a later copyist fabricated the verse.
The surviving early manuscript evidence gives no adequate basis for declaring John 12:41 a late scribal insertion.
But the distinction between reported teaching and the narrator’s theological explanation is indispensable.
We should not place words in Jesus’ mouth that the Gospel attributes to its narrator.
The historical interpreter must first identify who makes the claim.
Only then can the claim be evaluated.
VII. JOHN REALLY DOES CONNECT JESUS WITH YAHWEH’S GLORY
This is the point the investigation must confront directly.
In Isaiah 6:5, Isaiah identifies the enthroned figure as Yahweh of hosts.
John 12:41 connects Isaiah’s vision with Jesus’ glory.
That is a substantial Johannine theological association.
The Gospel does not simply say Isaiah was an interesting historical prophet.
It interprets Isaiah’s testimony as bearing witness to Jesus.
John 12:45 intensifies the relationship when Jesus says that seeing him is seeing the one who sent him.
The Son is portrayed as revealing the Father.
A serious analysis cannot weaken this evidence merely by observing that Jesus and the Father are grammatically distinct persons.
But neither may it move immediately from that relationship to the conclusion that every divine act attributed to Yahweh across every period must therefore belong to the Father’s unqualified moral profile.
THE GOSPEL ESTABLISHES A POWERFUL REVELATORY RELATIONSHIP.
THE EXTENT AND IMPLICATIONS OF THAT RELATIONSHIP STILL REQUIRE INTERPRETATION.
John 1:18 and John 6:46 make the distinction especially important by presenting the Father as unseen and the Son as the revealer.
The connection to Yahweh’s glory is real.
The visibility and agency questions are also real.
Both belong in the evidence.
Neither should be erased.
VIII. THE PROPHETIC WORDS THEMSELVES ARE REWORKED
John 12:40 is not a mechanically identical reproduction of Isaiah 6:10.
In the Hebrew text of Isaiah, the divine commission includes commands addressed to the prophet concerning the people’s hearts, ears, and eyes.
In John’s quotation, the language presents the blinding and hardening as accomplished actions.
The grammatical shift has received explicit scholarly analysis.
That gives us a concrete example of the Gospel adapting an earlier prophetic text to explain the rejection of Jesus.
John is not writing a modern historical commentary on Isaiah.
He is interpreting scripture through the experience and theological claims of the Christian movement.
This matters because John 12:41 follows directly after that interpretive use of Isaiah.
The passage must therefore be evaluated both as a statement about Jesus and as an example of the Gospel’s method of rereading inherited scripture.
THE AUTHOR IS NOT MERELY TRANSMITTING AN EARLIER VISION.
HE IS EXPLAINING WHAT THAT VISION MEANS IN RELATION TO JESUS.
That later explanation is part of John’s evidence.
But it is not the same thing as an independent eighth-century identification of Jesus’ Father.
IX. JESUS SAID THEY WERE NOT READY TO UNDERSTAND EVERYTHING
Now we reach the distinction that completes this investigation.
Jesus himself acknowledges that his followers do not possess complete understanding.
In John 16:12, he tells them he still has much to say but that they cannot yet bear it.
In John 16:13, he promises the Spirit of Truth, who will guide them into fuller understanding.
In John 16:7, he connects the coming of the Advocate with his departure.
John 12:16 likewise states that Jesus’ disciples did not initially understand the significance of certain events; their understanding came afterward.
THE GOSPEL ITSELF ACKNOWLEDGES A DEVELOPMENT IN UNDERSTANDING.
That is crucial when interpreting the distinction between Jesus’ reported words and the narrator’s retrospective explanations.
The disciples were not represented as having understood everything during Jesus’ earthly ministry.
But there is an equally important qualification.
John 14:26 says the Advocate will teach and remind the disciples of Jesus’ words.
John 16:14 says the Spirit will glorify Jesus.
Thus, within the Gospel’s own theology, later understanding may be Spirit-guided.
We cannot simply assume that a retrospective interpretation is false because it came afterward.
Nor can historical criticism independently verify a claim of inspiration merely because the text makes it.
The appropriate method is to distinguish the levels of testimony and evaluate their relationships.
WHAT JESUS IS REPORTED TO HAVE SAID.
WHAT HIS DISCIPLES UNDERSTOOD AT THE TIME.
WHAT THE GOSPEL’S NARRATOR LATER EXPLAINS.
Those categories belong together.
They are not interchangeable.
X. THE RULER WHO IS JUDGED — AND THE FATHER WHO SPEAKS
John 12 places this interpretive discussion inside another striking scene.
Jesus addresses his Father.
A voice answers from heaven.
Jesus announces that the ruler of this world will be cast out.
He then calls humanity to believe in the light.
John 16 returns to these same themes.
The ruler of this world stands condemned.
The disciples still have more to learn.
The Spirit of Truth is promised.
That creates a consistent Johannine pattern of revelation, judgment, and the movement from darkness toward truth.
The ruler of this world is conventionally identified with Satan.
John does not explicitly identify him as Yahweh.
The Hebrew Bible’s descriptions of Yahweh’s earthly dominion, creation of darkness, and exercise of judgment belong in a later comparative investigation, but the shared language does not by itself prove the figures identical.
The same care applies to Sheol, divine hardening, and the attribution of deceptive or adversarial actions.
The identities must be tested through the complete evidence.
They cannot be assumed from one title.
For the present investigation, the essential point is that John distinguishes the Father who sends Jesus from the adversarial ruler whose authority Jesus announces will be overthrown.
XI. JOHN 8 RETURNS US TO THE CENTRAL TEST
John 8 supplies the most explicit dispute about genuine fatherhood.
Jesus distinguishes Abrahamic descent from the conduct expected of Abraham’s children.
His opponents claim God as Father.
Jesus challenges their claim.
He describes an operative fatherhood associated with falsehood and hostility to truth.
In John 8:54–55, he identifies his Father as the one his opponents claim as their God while denying that they know him.
The question concerns the distinction between religious designation and genuine knowledge.
A CLAIM OF FATHERHOOD IS NOT THE SAME AS DEMONSTRATED RELATIONSHIP.
AN INHERITED NAME DOES NOT ALONE ESTABLISH MORAL ALIGNMENT.
KNOWLEDGE OF THE FATHER CANNOT BE REDUCED TO POSSESSION OF A RELIGIOUS TEXT.
The Father-of-Aša investigation takes that internal Johannine criterion and applies it to a wider historical comparison.
That extension is a theological argument rather than a conclusion expressly stated by John 8.
But neither John 5 nor John 12 automatically invalidates it.
Moses’ testimony concerning Jesus does not settle every Mosaic divine attribution.
Isaiah’s vision, as interpreted by John, does not independently determine every aspect of the Father’s ultimate identity.
And Jesus’ promise of the Spirit of Truth requires us to recognize the Gospel’s distinction between initial understanding and subsequent interpretation.
The investigation therefore remains open on legitimate evidentiary grounds.
XII. THE FATHER OF COSMIC AŠA REMAINS THE AFFIRMATIVE CASE
Now return to Zarathustra.
The Gathas identify Ahura Mazda as Father of Aša.
Aša is cosmic Truth-Order, encompassing the right ordering of reality and moral existence, opposed to Druj.
That foundation predates the Fourth Gospel.
It exists independently of Christian theology.
The Persian-period evidence provides historical opportunities for the transmission and transformation of Iranian ideas within Jewish religious thought.
The Johannine writings supply a distinctive language of Truth, Light, Life, Love, and Fatherhood.
Diesel’s investigation asks whether these strands converge upon one ultimate divine reality.
That is an affirmative argument to be established through history, comparison, and philosophy of divine reference.
It cannot be proven merely by showing that Jesus criticized certain religious authorities.
It cannot be disproven merely by showing that Jesus accepted Moses as a witness or that John associated Jesus with Isaiah’s glory.
The entire record must be tested.
THE HISTORICAL FOUNDATION COMES FIRST.
THE DIVINE PROFILE MUST BE EXAMINED CONSISTENTLY.
THE FINAL IDENTITY CLAIM MUST ANSWER TO ITS PREMISES.
No inherited attribution receives an exemption from examination.
Neither does our own conclusion.
XIII. WHAT THE OBJECTIONS ACTUALLY PROVE
We can now state the results without ambiguity.
John 5:39–46 establishes that Jesus recognized Mosaic testimony concerning himself and used it to confront opponents who claimed Moses’ authority.
It does not establish unconditional approval of every Mosaic provision or divine portrayal.
Isaiah 6 records a prophetic vision and commission rooted in ancient Judah.
It was not originally a complete narrative about Jesus’ ministry.
John 12:38–41 brings earlier and later Isaianic material together through the Gospel narrator’s interpretation.
John 12:41 connects Jesus with Yahweh’s glory, an important theological claim that must remain in the record.
John 12:45 strongly identifies Jesus as the revealer of the one who sent him.
John 16:12–13 establishes that Jesus anticipated fuller understanding through the Spirit of Truth.
None of these statements, alone, proves that Ahura Mazda is Jesus’ Father.
But none independently forecloses examining that identification either.
The question remains one of cumulative evidence and competing explanations.
XIV. THE RECORD DOES NOT END WITH A NAME
Moses testified.
Isaiah saw a vision.
Later prophetic writers contributed to the collection bearing Isaiah’s name.
The Gospel interpreted those writings in relation to Jesus.
Jesus acknowledged that his disciples did not yet understand everything.
And he promised the coming of the Spirit of Truth.
Each statement must retain its own meaning.
The witness must not be mistaken for the verdict.
The prophet’s name must not be substituted for the history of his book.
The narrator’s theological interpretation must not silently become a direct quotation from Jesus.
And the promise of later understanding must not be used either to invalidate every subsequent interpretation or to place it beyond examination.
The Father-of-Aša investigation has never needed those shortcuts.
Its task is more demanding.
To examine historical transmission.
To distinguish religious claims from genuine knowledge.
To determine what cosmic Truth-Order requires of a divine profile.
And to ask whether the Father revealed through Jesus’ teaching corresponds to the ancient Father of Aša.
MOSES WAS THE WITNESS.
ISAIAH SAW THE VISION.
JOHN INTERPRETED THE GLORY.
JESUS PROMISED THE SPIRIT OF TRUTH.
AND THE IDENTITY OF THE FATHER MUST STILL ANSWER TO THE COMPLETE RECORD.
The inquiry continues because the evidence deserves examination—not because we have already dictated its outcome.
Aša knows Aša.
— Diesel the Magus
Primary texts and scholarship
Biblical texts: John 5:37–47 · Isaiah 6 · John 12 · John 14:25–27 · John 16:7–15 · Mark 10:2–9
Historical and textual scholarship: Joseph Blenkinsopp, Isaiah 40–55; The Oxford Handbook of Isaiah, “The Book of Isaiah: Its Composition History”; Morton Smith, “Bible ii. Persian Elements in the Bible”; Jerome H. Neyrey, “In Conclusion … John 12 as a Rhetorical Peroratio”; NET Bible notes on John 12:41 and 12:45.
Research status: This article answers the claim that John 5 and John 12 automatically establish the full identity of Jesus’ Father. It does not claim that the Mazda/Father identification has been proven, that John 12:41 is a late interpolation, or that intentional impersonation by Second Isaiah’s author has been established.