When applied to the The Urantia Book we get the lack of vision of those who invented it.I suppose that one of the thing who have make you believe into the "accuracy" of the "revelations" from The Urantia Book was the level of the science carried by those supposed "celestial beings with superior knowledge" ....lets see :
5.2 Criticism of its science
https://en.wikipedia.org/wiki/The_Urantia_Book#Criticism_of_its_science
Skeptics like Martin Gardner see the science in The Urantia Book as clear reflections of the views that prevailed at the time the book is said to have originated.[101] The claim by the authors, that no unknown scientific discoveries could be imparted, is seen as a ruse to allow mistakes to be dismissed later.[102] That presentation of post-1955 scientific knowledge is avoided is taken to be evidence it was written by humans and not by celestial beings with superior knowledge.[101]
Examples of criticisms regarding the science in The Urantia Book include:
The described formation of the solar system is consistent with the Chamberlin-Moulton planetesimal hypothesis,[103] which though popular in the early part of the 20th century, was discarded by the 1940s after major flaws were noted.[104] The currently accepted scientific explanation for the origin of the solar system is based on the nebular hypothesis.[103]
According to the book's descriptions, the universe is hundreds of billions of years old and periodically expands and contracts — "respires" — at 2-billion-year intervals. Recent observations suggest that the true age of the universe is approximately 13.7 billion years.[105] The book does not support the big bang theory.[106]
A fundamental particle called an "ultimaton" is proposed, with an electron being composed of 100 ultimatons. The particle is not known to be described anywhere else and the concept is not supported by modern particle physics.[107]
The Andromeda Galaxy is claimed to be "almost one million" light years away, repeating the understandings of the 1920s,[108] but the galaxy is now understood to be 2.5 million light years away.
The book repeats the mistaken idea that planets close to a sun will gradually spin slower until one hemisphere is left always turned to the sun due to tidal locking, citing Mercury as an example. Scientists at the time of the book's origin thought one side of Mercury always faced the sun, just as one side of the Moon always faces the Earth. In 1965, radio astronomers discovered however that Mercury rotates fast enough for all sides to see exposure to the sun.[106] Scientists further established that Mercury is locked in this spin rate in a stable resonance of 3 spins for every 2 orbits, and it is not slowing and so will never have one side left always turned to the sun.[109]
5.3 Use of other published material without attribution
https://en.wikipedia.org/wiki/The_Urantia_Book#Use_of_other_published_material_without_attribution
The Urantia Book states in its Foreword that more than one thousand "human concepts representing the highest and most advanced planetary knowledge of spiritual values and universe meanings"[124] were selected in preparing the papers. The authors say that they were required to "give preference to the highest existing human concepts pertaining to the subjects to be presented" and would "resort to pure revelation only when the concept of presentation has had no adequate previous expression by the human mind." One of the authors wrote in Part IV: "I well know that those concepts which have had origin in the human mind will prove more acceptable and helpful to all other human minds."[125]
In recent years, students of the papers have found that the free use of other sources appears to be true.[126][127] None of the material allegedly used from other sources is directly cited or referenced within the book.
In 1992, a reader of The Urantia Book, Matthew Block, self-published a paper that showed The Urantia Book utilized material from 15 other books.[128] All of the source authors identified in Block's paper were published in English between 1905 and 1943 by U.S. publishers and are typically scholarly or academic works that contain concepts and wording similar to what is found in The Urantia Book.[126] Block has since claimed to have discovered over 125 source texts that were incorporated into the papers.[129]
The use of outside source materials was studied separately by Gardner and Gooch, and they concluded that the book did plagiarize many of the sources noted by Block.[130][131]
For instance, Gardner and Block note that Paper 85 appears to have been taken from the first eight chapters of Origin and Evolution of Religion by Edward Washburn Hopkins, published by Yale University Press in 1923.[132] Each section of the paper corresponds to a chapter in the book, with several passages possibly used as direct material and further material used in Papers 86-90 and 92. (In addition to the book's "heavy indebtedness to Hopkins," Gardner discovered that Hopkins was a major reference in an earlier book authored by Sadler, adding to Gardner's view that it is more likely Sadler had a hand in writing or editing The Urantia Book than that celestial beings wrote it.) Likewise, much of The Urantia Book material relating to the evolution of mankind appears to have been directly taken from Henry Fairfield Osborn, Man Rises to Parnassus: Critical Epochs in the Prehistory of Man published by Princeton University Press in 1928.[133]
In one example cited by Block and confirmed by Gardner and Gooch, the original author discusses the periodicity of the chemical elements and concludes that the harmony in the construction of the atom suggests some unspecified plan of organization. The authors of The Urantia Book assert that this harmony is evidence of the intelligent design of the universe. W. F. G. Swann writes on page 64 of The Architecture of the Universe (italics indicate edits as compared to The Urantia Book, bolding indicates deletions):[134][135]
Go here for the detailed comparison :
5.3 Use of other published material without attribution
https://en.wikipedia.org/wiki/The_Urantia_Book#Use_of_other_published_material_without_attribution