55:2.2

This experience of translation from the material life to the morontia state—fusion of the immortal soul with the indwelling Adjuster—increases in frequency commensurate with the evolutionary progress of the planet. At first only a few mortals in each age attain translation levels of spiritual progress, but with the onset of the successive ages of the Teacher Sons, more and more Adjuster fusions occur before the termination of the lengthening lives of these progressing mortals; and by the time of the terminal mission of the Teacher Sons, approximately one quarter of these superb mortals are exempt from natural death.