The quote from Herman Melville's "Moby-Dick" expresses a deep yearning for freedom and liberation. The speaker conveys the desire to be unchained and unrestricted, akin to the liberty of air itself. This longing highlights a theme of seeking personal autonomy and the struggle against societal constraints, reflecting a profound philosophical contemplation on the nature of existence and individuality.

The mention of being "down in the whole world's books" suggests a connection to broader human experiences and literature. It implies that while one seeks freedom, they are also defined and influenced by the collective narratives and histories that shape humanity. This duality of yearning for freedom while being intertwined with global consciousness serves as a poignant reminder of the complexities of life and identity.