A Treatise On Human Nature, Volume 1 by David Hume

Being an Attempt to Introduce the Experimental Method of Reasoning into Moral Subjects.

An empiricist examination of human cognition and psychology arguing that all ideas originate from sensory impressions; it analyzes how perceptions and memories combine through association to form beliefs, treats causal relations as habitual expectations rather than observable necessities, and presents the self as merely a bundle of changing perceptions, while explaining how passions, custom, and experience govern reasoning and moral judgments.

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