What expression depicts Ocean's realization about the meaning of his life?

The realization that Ocean's life lacks meaning reflects a profound moment of introspection and existential contemplation. Throughout the narrative, Ocean grapples with feelings of disconnection and inadequacy, leading him to question the purpose and fulfillment of his existence. This awareness often signifies a turning point in characters' arcs, pushing them towards self-discovery or a search for deeper significance in their lives.

In contrast, the other expressions suggest different states of being that do not capture Ocean's internal struggle. The idea that his life is rewarding or full of joy implies satisfaction and fulfillment, which is not representative of Ocean's experience. Similarly, declaring that his life is challenging acknowledges obstacles but does not encompass the essential feeling of meaninglessness he perceives. Thus, recognizing that his life lacks meaning aligns with the theme of struggle and the quest for purpose that is prevalent in his journey.