Let it be understood, in the first place, that a science fiction story must be an exposition of a scientific theme and it must be also a story.
— Hugo Gernsback

I have serious doubts about the value of debates in a presidential election. They tend to be a test of reaction time rather than a genuine exposition of the participants philosophies and programs. Further, in debate, candidates tend to overstate their views. In the 1960 situation I had a very practical objection: Nixon was widely known; Kennedy was not; dramatic debates would therefore help Kennedy.
Dwight D. Eisenhower exposition quote

We have our little theory on all human and divine things. Poetry, the workings of genius itself, which, in all times, with one or another meaning, has been called Inspiration, and held to be mysterious and inscrutable, is no longer without its scientific exposition. The building of the lofty rhyme is like any other masonry or bricklaying: we have theories of its rise, height, decline and fall -- which latter, it would seem, is now near, among all people.
— Thomas Carlyle

Where questions of style and exposition are concerned I try to follow a simple maxim: if you can't say it clearly you don't understand it yourself.
— John Searle

Besides the actual reading in class of many poems, I would suggest you do two things: first, while teaching everything you can and keeping free of it, teach that poetry is a mode of discourse that differs from logical exposition.
— exposition quotation by A. R. Ammons