Psychology: The Test of Moral and Metaphysical Philosophy is a philosophical treatise written by Henry Longueville Mansel in 1855. The book explores the relationship between psychology, morality, and metaphysics. Mansel argues that psychology can serve as a test for moral and metaphysical theories, as it provides insights into the workings of the human mind and the nature of consciousness. The book is divided into two parts. The first part focuses...