This study analyzes Karl Jaspers' concept of the "substance of the whole" as presented in his work "The Spiritual Situation of the Age." The author argues that Jaspers does not employ this term in the traditional metaphysical sense of an unchanging entity independent of temporal processes. Instead, the term functions as a metaphor for an active, integrative principle inherent to the unfolding of events. This newly conceived substance is intrinsically linked to the processual nature of reality and serves to establish and maintain the integrity and cohesion of a whole. Rather than being defined by static immutability, this substance is characterized by an "organizational power" that sustains continuity over time while remaining inherently changeable itself. The text emphasizes the necessity of investigating the nature of this internal variability of substance and distinguishing it from mere external or accidental changes. In this way, substance is rehabilitated as a dynamic element that allows for a theoretical understanding of the unity of occurring wholes without resorting to obsolete ontological categories.