40:5.1 Mortals represent the last link in the chain of those beings who are called sons of God. The personal touch of the Original and Eternal Son passes on down through a series of decreasingly divine and increasingly human personalizations until there arrives a being much like yourselves, one you can see, hear, and touch. And then you are made spiritually aware of the great truth which your faith may grasp—sonship with the eternal God!
40:5.2 Likewise does the Original and Infinite Spirit, by a long series of decreasingly divine and increasingly human orders, draw nearer and nearer to the struggling creatures of the realms, reaching the limit of expression in the angels—than whom you were created but a little lower—who personally guard and guide you in the life journey of the mortal career of time.
40:5.3 God the Father does not, cannot, thus downstep himself to make such near personal contact with the almost limitless number of ascending creatures throughout the universe of universes. But the Father is not deprived of personal contact with his lowly creatures; you are not without the divine presence. Although God the Father cannot be with you by direct personality manifestation, he is in you and of you in the identity of the indwelling Thought Adjusters, the divine Monitors. Thus does the Father, who is the farthest from you in personality and in spirit, draw the nearest to you in the personality circuit and in the spirit touch of inner communion with the very souls of his mortal sons and daughters.
40:5.4 Spirit identification constitutes the secret of personal survival and determines the destiny of spiritual ascension. And since the Thought Adjusters are the only spirits of fusion potential to be identified with man during the life in the flesh, the mortals of time and space are primarily classified in accordance with their relation to these divine gifts, the indwelling Mystery Monitors. This classification is as follows:
40:5.5 Series one—mortals of the transient or experiential Adjuster sojourn. This series designation is temporary for any evolving planet, being used during the early stages of all inhabited worlds except those of the second series.
40:5.6 Mortals of series one inhabit the worlds of space during the earlier epochs of the evolution of mankind and embrace the most primitive types of human minds. On many worlds like pre-Adamic Urantia great numbers of the higher and more advanced types of primitive men acquire survival capacity but fail to attain Adjuster fusion. For ages upon ages, before man's ascent to the level of higher spiritual volition, the Adjusters occupy the minds of these struggling creatures during their short lives in the flesh, and the moment such will creatures are indwelt by Adjusters, the group guardian angels begin to function. While these mortals of the first series do not have personal guardians, they do have group custodians.
40:5.7 An experiential Adjuster remains with a primitive human being throughout his entire lifetime in the flesh. The Adjusters contribute much to the advancement of primitive men but are unable to form eternal unions with such mortals. This transient ministry of the Adjusters accomplishes two things: First, they gain valuable and actual experience in the nature and working of the evolutionary intellect, an experience which will be invaluable in connection with later contacts on other worlds with beings of higher development. Second, the transient sojourn of the Adjusters contributes much towards preparing their mortal subjects for possible subsequent Spirit fusion. All God-seeking souls of this type achieve eternal life through the spiritual embrace of the Mother Spirit of the local universe, thus becoming ascending mortals of the local universe regime. Many persons from pre-Adamic Urantia were thus advanced to the mansion worlds of Satania.
40:5.8 The Gods who ordained that mortal man should climb to higher levels of spiritual intelligence through long ages of evolutionary trials and tribulations, take note of his status and needs at every stage of the ascent; and always are they divinely fair and just, even charmingly merciful, in the final judgments of these struggling mortals of the early days of the evolving races.
40:5.9 Series two—mortals of the non-Adjuster-fusion types. These are specialized types of human beings who are not able to effect eternal union with their indwelling Adjusters. Type classification among the one-, two-, and three-brained races is not a factor in Adjuster fusion; all such mortals are akin, but these non-Adjuster-fusion types are a wholly different and markedly modified order of will creatures. Many of the nonbreathers belong to this series, and there are numerous other groups who do not ordinarily fuse with Adjusters.
40:5.10 Like series number one, each member of this group enjoys the ministry of a single Adjuster during lifetime in the flesh. During temporal life these Adjusters do everything for their subjects of temporary indwelling that is done on other worlds where the mortals are of fusion potential. The mortals of this second series are often indwelt by virgin Adjusters, but the higher human types are often in liaison with masterful and experienced Monitors.
40:5.11 In the ascendant plan for upstepping the animal-origin creatures, these beings enjoy the same devoted service of the Sons of God as is extended to the Urantia type of mortals. Seraphic co-operation with Adjusters on the nonfusion planets is just as fully provided as on the worlds of fusion potential; the guardians of destiny minister on such spheres just as on Urantia and similarly function at the time of mortal survival, at which time the surviving soul becomes Spirit fused.
40:5.12 When you encounter these modified mortal types on the mansion worlds, you will find no difficulty in communicating with them. There they speak the same system language but by a modified technique. These beings are identical with your order of creature life in spirit and personality manifestations, differing only in certain physical features and in the fact that they are nonfusible with Thought Adjusters.
40:5.13 As to just why this type of creature is never able to fuse with the Adjusters of the Universal Father, I am unable to say. Some of us incline to the belief that the Life Carriers, in their efforts to formulate beings capable of maintaining existence in an unusual planetary environment, are confronted with the necessity of making such radical modifications in the universe plan of intelligent will creatures that it becomes inherently impossible to bring about permanent union with the Adjusters. Often have we asked: Is this an intended or an unintended part of the ascension plan? but we have not found the answer.
40:5.14 Series three—mortals of Adjuster-fusion potential. All Father-fused mortals are of animal origin, just like the Urantia races. They embrace mortals of the one-brained, two-brained, and three-brained types of Adjuster-fusion potential. Urantians are of the intermediate or two-brained type, being in many ways humanly superior to the one-brained groups but definitely limited in comparison with the three-brained orders. These three types of physical-brain endowment are not factors in Adjuster bestowal, in seraphic service, or in any other phase of spirit ministry. The intellectual and spiritual differential between the three brain types characterizes individuals who are otherwise quite alike in mind endowment and spiritual potential, being greatest in the temporal life and tending to diminish as the mansion worlds are traversed one by one. From the system headquarters on, the progression of these three types is the same, and their eventual Paradise destiny is identical.
40:5.15 The unnumbered series. These narratives cannot possibly embrace all of the fascinating variations in the evolutionary worlds. You know that every tenth world is a decimal or experimental planet, but you know nothing of the other variables that punctuate the processional of the evolutionary spheres. There are differences too numerous to narrate even between the revealed orders of living creatures as between planets of the same group, but this presentation makes clear the essential differences in relation to the ascension career. And the ascension career is the most important factor in any consideration of the mortals of time and space.
40:5.16 As to the chances of mortal survival, let it be made forever clear: All souls of every possible phase of mortal existence will survive provided they manifest willingness to co-operate with their indwelling Adjusters and exhibit a desire to find God and to attain divine perfection, even though these desires be but the first faint flickers of the primitive comprehension of that "true light which lights every man who comes into the world."