Cowardice . . . is almost always simply a lack of ability to suspend the functioning of the imagination.
Source: In The New Webster's Dictionary of Quotations and Famous Phrases, by Donald Bolander, 1987.
-- Ernest Hemingway, (Jul 21 1889-1961), US journalist, novelist, short-story writer; He is known for his terse understated journalistic style, e.g., The Old Man and the Sea, 1953.