Science fiction - and the correct shortcut is 'sf' - uses actual scientific facts or theories for the source ideas or framework of the story. It has some scientific content, however speculative. If it breaks a law of physics, it knows it's doing so and follows up the consequences. If it invents a society of aliens, it does so with some respect for and knowledge of the social sciences and what you might call social probabilities. And some of it is literarily self-aware enough to treat its metaphors as metaphors.
Ursula K. Le GuinIf eternity had a season, it would be midsummer. Autumn, winter, spring are all change and passage, but at the height of summer the year stands poised. It's only a passing moment, but even as it passes the heart knows it cannot change.
Ursula K. Le GuinI know people, I know towns, farms, hills and rivers and rocks, I know how the sun at sunset in autumn falls on the side of a certain plowland in the hills; but what is the sense of giving a boundary to all that, of giving a name and ceasing to love where the name ceases to apply?
Ursula K. Le GuinThere is neither source nor end, for all things are in the Center of Time. As all the stars may be reflected in a round raindrop falling in the night: so too do all the stars reflect the raindrop. There is neither darkness nor death, for all things are, in the Light of the Moment, and their end and their beginning are one.
Ursula K. Le Guin