In 'On Love,' renowned French author Stendhal embarks on a rational, psychological dissection of the most irrational of human emotions. Not a novel, but a detailed treatise, the book explores the various stages and types of love, famously introducing the concept of 'crystallization'—the mental process by which a lover endows the beloved with sublime perfections. Stendhal combines personal anecdotes, historical examples, and sharp analysis to create a timeless and foundational text on the nature of passion, jealousy, and intimacy, making it an essential read for anyone intrigued by the psychology of romance.