Thomas Nagel explores the concept of absurdity, arguing that the significance of our actions is not diminished by their perceived lack of importance over time. He contrasts his views with those of Camus, discussing the internal conflict between our aspirations and the indifferent reality of the universe. Nagel suggests that we must balance seriousness about our goals with an awareness of the absurdity of life, advocating for a perspective that incorporates both humility and irony.