Internet Archive. 2026This study examines the philosophical relationship between difference, unity, and harmony from the perspective of the Theory of Unity-Formation. It proceeds from the thesis that difference does not designate a metaphysical first principle, but rather constitutes the epistemogenetic condition under which anything can become determinable for an individual and be organized into unities. Accordingly, unity is understood not as an originally given state, but as the result of a process in which experientially effective differences are affectively accentuated, emotionally weighted, related to one another, integrated, and stabilized. The distinction between experiential understanding and conceptual understanding shows that differences can already be organized as experientially effective before they are conceptually explicated, while conceptual understanding differentiates and transforms such experiential contexts and, in turn, acts back upon the further organization of experience. Coherence thereby acquires the systematic status of a dimension of validation of already formed unities, whereas incoherence can reveal the limits of their viability and become the starting point for problematization and new organization. Harmony is defined not as the goal or fundamental principle of unity-formation, but as a particular experiential form of coherence in which organized differences are experienced as connected, balanced, or fulfilling in a distinctive way. The longing for harmony can accordingly be reconstructed as a possible affectively and emotionally weighted orientation that may arise from incoherence experienced as separation, lack, or loss and may be transformed within conceptual understanding into the idea of wholeness or absolute unity. The idea of difference-free unity thereby proves to be a limit-concept of conceptual understanding, since even its conceptual determination once again presupposes distinctions. Neither experiences of unity nor ideas of absolute unity, however, permit the inference that reality itself is structured accordingly, since they remain unity-formations within individual actuality, and the theory limits its own epistemic claim to the reconstruction of the conditions of their emergence. The study thus arrives at a reversal of the traditional philosophical question: it is not the return to a presupposed unity that explains difference and understanding; rather, what must be explained is how unity, coherence, harmony, and ultimately even the longing for difference-free unity can arise from difference that has become experientially effective. ( direct link )