Date: 1755

"But since the brain doth lodge the pow'rs of sense, / How makes it in the heart those passions spring?"

— Davies [from Johnson's Dictionary of the English Language]

Date: 1901

"The double aspect theory ... professes to overcome the onesidedness of these two theories [materialism and idealism] by regarding both series as only different aspects of the same reality, like the convex and the concave views of a curve (G.H. Lewes); or, according to another favourite metaphor,...

— Baldwin, James Mark (1861-1934)

Date: 1901

"Repeating Locke's metaphor, Kant blames Hume for declaring certain questions to lie beyond the 'horizon' of human knowledge, without determining where that horizon falls."

— Baldwin, James Mark (1861-1934)