Books are the ever burning lamps of accumulated wisdom.

Curtis’s metaphor casts books as “ever burning lamps,” emphasizing their role as durable, transmissible sources of light—i.e., understanding—across time. The phrase “accumulated wisdom” suggests knowledge is not merely individual inspiration but a collective inheritance built by many minds and preserved in print. The image also implies guidance: lamps help readers navigate ignorance, error, and the darkness of unexamined life. In a broader nineteenth-century American context (Curtis was a prominent essayist and public intellectual), the sentiment aligns with ideals of self-culture, civic education, and moral improvement through reading, presenting books as both repositories of the past and practical instruments for personal and social progress.