It seemed like forever ago, like we've had this brief but still infinite forever. Some infinities are bigger than other infinities.

This line is spoken by Hazel Grace Lancaster in John Green’s novel *The Fault in Our Stars* (2012), reflecting on her relationship with Augustus Waters. Both are teenagers living with cancer, and their time together is intensely meaningful yet constrained by illness and mortality. The phrasing echoes a motif in the book: the attempt to measure a life not by its length but by its depth, and to find language for love and loss when the future is uncertain. Green draws on the mathematical idea of different “sizes” of infinity to express how a short shared span can still feel boundless to those living it.

The quote juxtaposes the finite and the infinite to capture how human experience can expand beyond clock time. “Brief but still infinite forever” suggests that a relationship can create its own sense of eternity—an internal, qualitative infinity—despite being objectively short. The claim that “some infinities are bigger than other infinities” borrows from mathematics (different cardinalities) as a metaphor for emotional magnitude: not all “forevers” are equal, and a limited life can still contain a vast amount of meaning. It reframes tragedy by insisting that value is not erased by brevity; intensity and significance can outweigh duration.