UNDERSTANDING, n. A cerebral secretion that enables one having it to know a house from a horse by the roof on the house. Its nature and laws have been exhaustively expounded by Locke, who rode a house, and Kant, who lived in a horse.
Ambrose Bierce (2013). “Delphi Complete Works of Ambrose Bierce (Illustrated)”, p.2534, Delphi Classics