This text examines the essence of life as an active "performance" or "execution" and seeks the source of this activity, which it locates exclusively within the subject rather than in the external environment. Although life necessitates orientation in the world and the acceptance of external stimuli, this receptivity is not a passive consequence of circumstances but a result of subjective effort. The author emphasizes the crucial role of a source that initiates events transcending the mere inertia of given realities. Particular attention is paid to the ontological status of the subject: if life is understood as a performance, the question arises whether the performer must be alive prior to the act of living. The text arrives at the hypothesis that the subject cannot be reduced to a mere "being" (jsoucno), as its capacity to execute being suggests a deeper nature exceeding traditional definitions of existence. This reflection opens a space for a new understanding of the relationship between activity, life, and being within the context of subjectivity.