What Is the Fourth Dimension?

[Back to my ultimate martial soul choice this time...]

["Herrscher of Reason Divine Core" is also a God King Level Martial Soul, wielding the authority of the Fourth Dimension: "understanding"!]

[With a single thought, comprehend all principles in the world; with a single glance, see through the origin of all things. Omniscient, omnipotent, manifesting truth!]

[The most fundamental core abilities of this authority, "understanding," are "Analysis of All Things" and "Construct from Nothing."]

[Nothing within the Herrscher of Reason's field of vision could escape the Divine Core's deconstruction.]

[All matter, technology, martial souls, soul beasts, and even the Soul Power drifting between heaven and earth would be instantly deconstructed by the Divine Core!]

[Its outer appearance would be stripped away layer by layer, reaching straight to the essence of molecules, atoms, and even finer microscopic particles!]

[Once the principles behind any technological creation were fully understood, all it took was sufficient raw materials to ignore production lines and create something from nothing!]

[To put it as plainly as possible, a single sentence could sum up the power of this Divine Core.]

[The "Herrscher of Reason Divine Core" transcends the constraints of the three-dimensional universe. As a technological creation comparable to the Fourth Dimension, it possesses the authority to elevate low-dimensional lifeforms into the Fourth Dimension!]

[As I said before, a true dimensionality-reduction strike is absolute suppression. This has never been a contest of brute force, but an absolute barrier between levels of life, leaving no room whatsoever for resistance!]

[The pen in a writer's hand could directly define the form, rise, and decline of a one-dimensional world without following any logic.]

[When a painter personally tore apart a painting created with painstaking effort, from the perspective of the civilizations within that two-dimensional world, it would be the heavens collapsing and the earth crumbling in an apocalyptic catastrophe! A world-ending disaster beyond the comprehension they could exhaust their entire lives trying to understand!]

[Not to mention that the Herrscher of Reason itself is the most unsolvable judge of every technological civilization within the three-dimensional universe!]

[Honestly, in the worldview of the Honkai Plane, Herrschers were originally executors of the Honkai God's will.]

[Yet every Herrscher of Reason throughout history had been a rebel. If not for that, humanity's civilization in the Honkai Plane would have long since ceased to exist...]

[Of course, the universe is eternally undergoing increasing entropy. There has never been any absolutely invincible power.]

[Even fourth-dimensional technology like the "Herrscher of Reason Divine Core" could not escape the law of gradual growth.]

[But once the Herrscher of Reason fully matured, I would be able to easily launch a dimensionality-reduction strike in this three-dimensional universe known as the Douluo Continent!]

[A dimensionality-reduction strike may be absolute suppression, but no matter how invincible an authority is, it still needs a medium to manifest.]

[Just as a writer needed a pen to freely alter the course of a one-dimensional world, and a painter needed to tear up a painting to destroy an entire two-dimensional world...]

[Right now, I have only initially bonded with the Divine Core and have yet to forge my own Fourth Dimension "pen."]

[I'll keep a low profile and develop for a while first. Once my strength takes shape, I wouldn't mind protecting my Douluo Continent.]

Qian Renxue of Soul Land I: "Protecting my Douluo Continent?"

Heaven Dou Imperial Palace, main hall.

Qian Renxue, disguised as Xue Qinghe, sat upright upon the throne. She appeared to be reviewing memorials, but her gaze had never once left the Diary Copy.

She inexplicably discovered that reviewing memorials and handling state affairs while secretly stealing glances at diary updates gave her an especially pleasant feeling of slacking off.

"Protecting my Douluo Continent?"

Qian Renxue's hand paused as she turned a memorial, and a hint of astonishment flashed through her cold eyes.

Had this youth's ambitions already swollen to such an extent?

He had clearly only just awakened his martial soul and had not even touched the threshold of a Titled Douluo, yet he was already talking about protecting the entire Douluo Continent.

If this still counted as keeping a low profile, then she had nothing more to say.

"Could this Divine Core martial soul truly possess such unimaginable abilities?" Qian Renxue slightly furrowed her brows and murmured softly.

If that were not the case, an ordinary Soul Master could never possibly possess such confidence in looking down upon the entire Douluo Continent.

At that moment, Qian Renxue recalled the dimensional theories explained in the diary. An inexplicable chill rose from the depths of her heart.

Merely the tip of the iceberg revealed through those words was enough to offer a glimpse of the despair brought by dimensional suppression...

That was not a gap in Soul Power, bloodline, or Divine Position, but an absolute chasm between dimensional levels and tiers of life!

It was the utter, absolute despair of low-dimensional beings facing higher-dimensional existences, with no hope of turning the tables from beginning to end!

Qian Renxue was not the only one. At that moment, all the heroines with Diary Copies had a question arise in their hearts: what exactly was the essence of the fourth dimension?

Living in a third-dimensional universe, they could understand the three coordinate axes of length, width, and height—the x, y, and z axes—that Qin Moyu had mentioned.

But what would that additional, unknown coordinate axis, completely perpendicular to three-dimensional space, actually look like—the Fourth Dimension?

As if responding to their thoughts, the Diary System quietly revealed today's diary topic...

[I nearly forgot to write today's diary topic. Let me take a look.]

[What is the Fourth Dimension?]

[This question... is quite profound. I can't guarantee that my answer is accurate, even though I have personally witnessed the Fourth Dimension.]

[Why do I say that? Because the Fourth Dimension I witnessed was only glimpsed after I used the technological means of the Divine Core to ascend into a four-dimensional lifeform. I call this dimension the Dark Plane Dimension.]

[If the vast and boundless Fourth-Dimensional Universe were compared to a gigantic iceberg, then the Dark Plane would merely be the tip rising above the water.]

[People saw the iceberg's grandeur, yet did not know that beneath the water lay its largest, coldest, and darkest main body!]

[The boundless Dark Plane seemed vast beyond measure, but before the true Fourth-Dimensional Universe, it was merely the shallowest corner of the landscape—not even one hundred-millionth of the Fourth Dimension's full extent!]

[As for the Fourth Dimension, it has been defined as the dimension of "time." From a physics perspective, it consists of four coordinate systems: the x, y, z, and time axes.]

[This is merely an abstract understanding, a common definition tailored to the cognition of the three-dimensional universe. It is far from sufficient to explain the true entirety of the four-dimensional universe.]

[Ordinary people who have lived in the three-dimensional universe for long periods have already had their vision and cognition locked in place by three-dimensional physical concepts. They simply cannot directly imagine or describe the true concept of this fourth coordinate axis...]

[Unable to peer into the truth of the higher-dimensional universe, they can only rely on the external characteristics of the four-dimensional world and broadly label it "time" as an abstract interpretation.]

[Honestly, I can understand this abstract definition, since I personally experienced ascension and glimpsed a corner of the four-dimensional universe's true scenery.]

[Under the gaze of four-dimensional beings, every rule of the three-dimensional world would completely collapse.]

[Any entity with a trajectory of movement would no longer be a fleeting image, but would possess temporal afterimages derived from and attached to its physical form.]

[The colors of these temporal afterimages would be somewhat dim, and like an elderly person pacing slowly, they would continuously repeat the trajectories of past, present, and future actions.]

[Put simply, the eyes of four-dimensional beings are innately capable of observing timelines. With one glance, they overlook the past, stare directly at the present, and foresee the future!]

[This is why top-tier god-level civilizations named the Fourth Dimension "time."]

[And that is precisely why dimensionality-reduction strikes can truly be called unsolvable.]

[Setting aside whether four-dimensional beings can directly alter timelines, a three-dimensional lifeform that is young one second could have its time wantonly altered the next, reduced to a lifeless state in its twilight years...]

[The most intuitive difference is this: within the vision of four-dimensional beings, every action of a three-dimensional being—past, present, and future—is a traceable trajectory.]

[The desperate resistance of three-dimensional beings would be no different from the futile struggle of puppets on strings in their eyes. The outcome was already decided from the very beginning.]