This text explores the philosophical concept of the subject and its life in a broad sense. The author posits that all true beings, including pre-living entities, should be considered subjects. The term life is preferred over being because traditional ontological definitions often strip existence of temporality and spontaneous activity. According to this view, life is not a passive occurrence or a mere process that happens to a being; rather, it is an active performance carried out by the subject itself. A subject is not a static entity distanced from its actions; instead, it is continuously transformed, established, and renewed through its own activities. In this sense, living is the ontological act of self-constitution and self-affirmation. By redefining being as an active performance, the text emphasizes that every true entity must actively enact its existence. This perspective bridges the gap between pre-biological existence and life, framing both as manifestations of a subject's inherent activity.