The more we know, the more we feel our ignorance; the more we feel how much remains unknown; and in philosophy, the sentiment of the Macedonian hero can never apply, — there are always new worlds to conquer.

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Source, in full

Discourse Delivered at the Royal Society (30 November 1825), published in Six Discourses delivered before the Royal Society, at their Anniversary Meetings, on the Award of the Royal and Copley Medals, preceded by an Address to the Society on the Progress and Prospects of Science (1827); also in The Edinburgh Review, or Critical Journal (October 1827)

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Attribution

Quote text and notes from Wikiquote: Humphry Davy (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.