This text examines a fundamental ontological distinction between activity as the self-performance of an entity's own being and activity in the form of actions through which the entity transcends its boundaries and engages with its surroundings. The author argues for the necessity of distinguishing these two types of activity to prevent conceptual confusion in subsequent reasoning. Although self-performance and outward actions are not identical, they are inextricably linked: external actions inevitably influence internal self-performance, while the entity's internal being conditions its external reach. The text emphasizes that these aspects must neither be confused nor isolated in thought. This distinction is crucial for explaining the possibility of reflection—not merely as consciousness, but as "re-flexion" in its original sense of a return to oneself. Such a return presupposes an outward-directed action while remaining a distinct inward performance. Ultimately, the reflection on these dynamics provides a deeper insight into the nature of existence and the structure of subjective agency.