Volume 3 of the eleven-volume complete edition contains the most famous work of theologian and philosopher Ladislaus Boros: "Mysterium mortis: Man in the Final Decision," accompanied by a longer commentary introduction by Cynthia Bourgeault. Additionally, this volume includes the two individual titles "Redeemed Existence: Theological Reflections" and "Phases of Life."

"Mysterium mortis, Ladislaus Boros' now-forgotten masterpiece, deserves far greater recognition. It remains an authentic example of visionary theology in its most sublime form, with a message that is simultaneously challenging, timeless, and profoundly hopeful" (Cynthia Bourgeault).

"The essence of the hypothesis that we will attempt to substantiate in Mysterium mortis is as follows: In death, the possibility for the first fully personal act of man is opened, thus death is the ontologically preferred place of awareness, freedom, encounter with God, and decision about eternal fate. Death is the site of total intuition. A powerful vision of reality arises in death. At the same time, the dividing line created by future-oriented attention between present and past dissolves, and man stands there as pure duration, in the fullness of all life. The past, which was immobile and equally only frozen within him, warms up and comes to life. This is the birth of the spirit to its world-becoming and to its own totality. Thus, the universe emerges in its full form in the act of death, and man becomes aware of his own undivided life. From his now wholly established being, he is now able, and only now, to make his holistic decision.".