The expression "negative capability" was introduced in 1817 by English poet John Keats to describe the ability of accomplished writers (especially Shakespeare) to seek artistic beauty, although it may result in uncertainty or confusion. It is in opposition to a reasonal vision of art.
Keats' work is distinguished by the use of a sensual, visually descriptive and allegorical style, especially in his odes. His poetry emphasizes great feelings through natural imagery. One of his most famous pieces of work is "Ode to a Nightingale."
Regarding his life, Keats became a doctor at the same time he wrote poetry. He later gave up medicine to become a full time writer. However, he considered the heart holy, and imagination and beauty as the truth. His lovers Isabella Jones and Fanny Brawne were an enourmous inspiration for Keats, who wrote the sonnet "Bright Star" after them.