Eph 3:10 (Principalities and Authorities in the Heavenly Places) articulates the related cluster of terms that express the "Pauline" spirit world in Ephesians'. Through a psychological-hermeneutical study, this book contributes to provide a theologically-founded response to the immense challenges the spirit world apprehensions among the Igbo (Africans), pose to true discipleship in these settings. Identifying the strongly influential role played here by the Igbo traditional religion/world view(s) and the foundation of these biblical terms in the attempts at Weltbewaltigung, the book highlights how proper appreciation of the Christological paraenetics of Eph enhances critical consciousness and cognitive reconstruction towards mature faith and societal betterment.