When the poet is most inspired, is stimulated by an aura which never even colors the afternoons of common men, then his talent is all gone, and he is no longer a poet.
 Henry David Thoreau, A Week on the Concord and Merrimack Rivers (1849). copy citation

Context

“We talk of genius as if it were a mere knack, and the poet could only express what other men conceived. But in comparison with his task, the poet is the least talented of any; the writer of prose has more skill. See what talent the smith has. His material is pliant in his hands. When the poet is most inspired, is stimulated by an aura which never even colors the afternoons of common men, then his talent is all gone, and he is no longer a poet. The gods do not grant him any skill more than another. They never put their gifts into his hands, but they encompass and sustain him with their breath. To say that God has given a man many and great talents, frequently means that he has brought his heavens down within reach of his hands.” source