49:4.9 (565.1) But mortal mind without immortal spirit cannot survive. The mind of man is mortal; only the bestowed spirit is immortal. Survival is dependent on spiritualization by the ministry of the Adjuster—on the birth and evolution of the immortal soul; at least, there must not have developed an antagonism towards the Adjuster’s mission of effecting the spiritual transformation of the material mind. 5. The Planetary Series of Mortals
49:5.1 (565.2) It will be somewhat difficult to make an adequate portrayal of the planetary series of mortals because you know so little about them, and because there are so many variations. Mortal creatures may, however, be studied from numerous viewpoints, among which are the following:
49:5.2 (565.3) 1. Adjustment to planetary environment.
49:5.3 (565.4) 2. Brain-type series.
49:5.4 (565.5) 3. Spirit-reception series.
49:5.5 (565.6) 4. Planetary-mortal epochs.
49:5.6 (565.7) 5. Creature-kinship serials.
49:5.7 (565.8) 6. Adjuster-fusion series.
49:5.8 (565.9) 7. Techniques of terrestrial escape.
49:5.9 (565.10) The inhabited spheres of the seven superuniverses are peopled with mortals who simultaneously classify in some one or more categories of each of these seven generalized classes of evolutionary creature life. But even these general classifications make no provision for such beings as midsoniters nor for certain other forms of intelligent life. The inhabited worlds, as they have been presented in these narratives, are peopled with evolutionary mortal creatures, but there are other life forms.
49:5.10 (565.11) 1.
49:5.11 (565.12) Normal adjustments to planetary conditions follow the general physical patterns previously considered. The worlds of the nonbreathers typify the radical or extreme adjustment, but other types are also included in this group. Experimental worlds are usually ideally adapted to the typical life forms, and on these decimal planets the Life Carriers attempt to produce beneficial variations in the standard life designs. Since your world is an experimental planet, it differs markedly from its sister spheres in Satania; many forms of life have appeared on Urantia that are not found elsewhere; likewise are many common species absent from your planet.
49:5.12 (565.13) In the universe of Nebadon, all the life-modification worlds are serially linked together and constitute a special domain of universe affairs which is given attention by designated administrators; and all of these experimental worlds are periodically inspected by a corps of universe directors whose chief is the veteran finaliter known in Satania as Tabamantia.
49:5.13 (566.1) 2.
49:5.14 (566.2) From the two-hemisphere type of the Urantian cerebral cortex you can, by analogy, grasp something of the one-brained type. The third brain of the three-brained orders is best conceived as an evolvement of your lower or rudimentary form of brain, which is developed to the point where it functions chiefly in control of physical activities, leaving the two superior brains free for higher engagements: one for intellectual functions and the other for the spiritual-counterparting activities of the Thought Adjuster.
49:5.15 (566.3) While the terrestrial attainments of the one-brained races are slightly limited in comparison with the two-brained orders, the older planets of the three-brained group exhibit civilizations that would astound Urantians, and which would somewhat shame yours by comparison. In mechanical development and material civilization, even in intellectual progress, the two-brained mortal worlds are able to equal the three-brained spheres. But in the higher control of mind and development of intellectual and spiritual reciprocation, you are somewhat inferior.
49:5.16 (566.4) All such comparative estimates concerning the intellectual progress or the spiritual attainments of any world or group of worlds should in fairness recognize planetary age; much, very much, depends on age, the help of the biologic uplifters, and the subsequent missions of the various orders of the divine Sons.
