The quote reflects the overwhelming nature of possibilities, comparing them to an uncontrollable condition like cancer. The speaker feels that as they dwell on various possibilities, they only seem to increase, creating a sense of chaos and lack of control in their life. This metaphor highlights the anxiety that comes with contemplating numerous potential outcomes.

In the context of Haruki Murakami's "Dance Dance Dance," this sentiment emphasizes the struggle of navigating life's uncertainties. The character's feeling of being overwhelmed by choices resonates with readers who have experienced similar moments of paralysis in decision-making, illustrating how possibilities can lead to mental turmoil rather than clarity.