Hemingway describes a principle of writing in which deliberately leaving material unstated can make a story more powerful. The important condition is that the writer must know what has been omitted. The missing material should remain present indirectly through the structure, detail and emotional weight of the work, allowing readers to sense more than the text explicitly explains.

This idea is closely associated with Hemingway’s “iceberg theory” of prose. The visible part of a story represents only a fraction of what the writer understands, while the larger meaning remains beneath the surface. Omission, in this sense, is not a substitute for knowledge but a consequence of it. The technique depends on judgement: leaving out material can strengthen a story when the unstated elements continue to shape what is written. The result can create ambiguity, subtext and emotional depth without extensive explanation.