Back to the earlier idea: Neshamos Yisroel have a shoresh in Atzilus (Z”A, Ihu vi Chayohi Vigarmohi Chad) not only in Kisei HaKavod. Explanation: Hishtalshelus happens because Neshamos are mushrash [chakuk] in Atzmus.
Page 468-70, NEW SV p. 617-10. MP3