Final answer:
John Keats compares reading great literature to making great journeys.
Step-by-step explanation:
In the poem 'On First Looking into Chapman's Homer,' the poet John Keats compares reading great literature to making great journeys. Keats uses the metaphor of exploration and discovery to convey the idea that reading epic works like 'The Iliad' and 'The Odyssey' by Homer is a transformative experience, similar to embarking on a grand adventure and uncovering new lands. By reading these literary masterpieces, the reader can discover new insights, emotions, and perspectives, just as explorers discover new continents.