Metaphysical poetry emerged in the Jacobean era and was characterized by dramatic speech, concentration on a single idea, expanded epigrams, conceits, witty allusions, a blend of passion and logic, and the fusion of sensual and spiritual experiences. John Donne is considered the founder of metaphysical poetry, known for his unconventional style that included colloquial language, prosaic diction, hyperbole, and fantastic imagery. Metaphysical poetry reacted against the sweetness of Elizabethan poetry in favor of a more rugged style.