In "Lost in the Cosmos: The Last Self-Help Book," Walker Percy explores the tension between theoretical understanding and the tangible act of consumption. He suggests that individuals can feel equally lost in both realms, highlighting the struggle of the self amidst abstract concepts and material satisfaction. This duality raises questions about the human experience and our search for meaning in a world that often values superficial consumption over deeper intellectual engagement.

Percy's assertion emphasizes the complexity of navigating existence, as the pursuit of knowledge and the indulgence in consumerism can leave one feeling isolated and disoriented. He prompts readers to reflect on how their identities and senses of purpose are shaped by both high ideals and everyday practices. Ultimately, Percy encourages a reconciliation of theory and consumption to foster a more integrated understanding of the self.