LitCharts assigns a color and icon to each theme in Aristotle and Dante Discover the Secrets of the Universe, which you can use to track the themes throughout the work.
Identity, Ethnicity, and Masculinity
Silence and Trauma vs. Communication
Family and Coming of Age
Intellectualism and Emotion vs. Physical Strength
Summary
Analysis
Ari flips through his journal and decides that his handwriting is horrible. He writes that he learned to swim this summer, but then amends it to say that Dante taught him to swim. He tears out the page.
This entry likely means more to Ari than just learning to swim; it’s likely an admission on some level of the love they share, hence not wanting to face it or make it real by leaving the pace intact.