If the psychic circles are not reached due to unavoidable handicaps, we are granted a parole on the mansion worlds to prolong our probationary period. We will be afforded additional time in which to prove ourselves.  There can be no handicap of human heredity or deprivation of mortal environment which the morontia career will not fully compensate and wholly remove. 
The believer who feels with certainty that he is inhabited by a part of the Absolute-Father dares to challenge human limitations because he knows that he has with him a superior power that can achieve those challenges. 
Limitations of intellect, curtailment of education, deprivation of culture, impoverishment of social status, even inferiority of the human standards of morality resulting from the unfortunate lack of educational, cultural, and social advantages, cannot invalidate the presence of the divine spirit in such unfortunate and humanly handicapped but believing individuals. 
While the hereditary legacy of cerebral endowment and that of electrochemical overcontrol both operate to delimit the sphere of efficient Adjuster activity, no hereditary handicap, in normal minds, ever prevents eventual spiritual achievement.