"What is his sorrow?" she asked the Gryphon. The Gryphon replied that it is all just his imagination; he doesn't actually have any sorrow. This exchange highlights the playful and whimsical nature of the dialogue in Lewis Carroll's stories, where characters often discuss feelings and concepts in a fantastical context.
The scene illustrates the theme of perception versus reality, suggesting that some feelings or troubles may be imagined rather than real. Carroll's storytelling invites readers to question the nature of emotions and the way they can be influenced or fabricated by our minds, fitting well within the surreal and inventive universe of Alice in Wonderland and Through the Looking-Glass.