The ability to entertain error or experience evil will not be fully lost until the ascending human soul achieves final spirit levels.  Adam and Eve’s transgression had been an error of judgment and not the sin of conscious and deliberate rebellion.  Disappointment and sorrow attend upon error because, not being a reality, it cannot be realized in experience. 
Evolutionary man finds it difficult fully to comprehend the significance and to grasp the meanings of evil, error, sin, and iniquity. Man is slow to perceive that contrastive perfection and imperfection produce potential evil; that conflicting truth and falsehood create confusing error. 
The mistakes of mortal mind and the errors of human conduct may markedly delay the evolution of the soul, although they cannot inhibit such a morontia phenomenon when once it has been initiated by the indwelling Adjuster with the consent of the creature will.  Memories of past life without spiritual meaning will perish with material brain. 
We must be gentle in our dealings with erring mortals.  Jesus did not attack error or mention the flaws of his disciples, rather embellished the truth they already had.  Living truths drive out all serious error.  In our lives overthrow error and overcome evil by the love of the living truth. 
Error is the inevitable result of the range of choice with which immature creatures must be endowed in order to enjoy universe progression by making freewill contact with reality.  Misadaptation, disharmony, and conflict, all these things are inherent in evolutionary growth, from physical universes to personal creatures.  Error might be regarded as a misconception or distortion of reality.  Error is the possibility of choose unwised judgments. The only evolutionary world without error would be a world without free intelligence.  Error is the shadow of relative incompleteness which must of necessity fall across man’s ascending universe path to Paradise perfection. 
There is no error greater than that species of self-deception which leads intelligent beings to crave the exercise of power over other beings for the purpose of depriving these persons of their natural liberties.  It is difficult for angels and midwayers to conceive of brilliant, trusted rulers like Caligastia going astray.