The text explores the philosophical and phenomenological concept of experience. The fundamental prerequisite for experience is reactivity, or the subject's capacity to undergo something. Every reaction results in both an external consequence—a change in circumstances—and a subjective internal experience. For individual experiences to coalesce into a coherent whole, they must be integrated and processed by the subject, relating them to specific objects or types. Experience is thus not merely a collection of memories but a synthesized structure of internal traces and external outcomes. The act of experiencing leaves lasting impressions within the subject and modifications in the surrounding environment. Experience integrates these traces through subsequent interactions, forming a unified understanding. The author posits that experience is irreducible to memory alone and necessitates the active participation of the subject. This reflection clarifies how subjective processing transforms isolated reactions into a comprehensive experience of the world.