In Jonathan Safran Foer's novel "Extremely Loud and Incredibly Close," the phrase "As long as I am thinking, I am alive" suggests the profound significance of thought as a measure of existence. It highlights how awareness and contemplation contribute to a person's sense of being. The character's journey reflects the idea that engaging with one's thoughts and emotions is vital to life, implying that the act of thinking itself can be a source of vitality and connection to the world.

This notion resonates throughout the narrative as the protagonist grapples with themes of loss, trauma, and the quest for understanding. The exploration of thoughts not only underscores the importance of mental engagement but also emphasizes the complexities of human experience. In this way, Foer's work invites readers to consider how their own thoughts shape their realities and relationships, affirming that the process of thinking is a fundamental aspect of living fully.