Sci-fi uses the images that sf - starting with H.G. Wells - made familiar: space travel, aliens, galactic wars and federations, time machines, et cetera, taking them literally, not caring if they are possible or even plausible. It has no interest in or relation to real science or technology. It's fantasy in space suits. Spectacle. Wizards with lasers. Kids with ray guns. I've written both, but I have to say I respect science fiction enough that I wince when people call it sci-fi.
Ursula K. Le GuinChange is freedom, change is life. It's always easier not to think for oneself. Find a nice safe hierarchy and settle in. Don't make changes, don't risk disapproval, don't upset your syndics. It's always easiest to let yourself be governed. There's a point, around age twenty, when you have to choose whether to be like everybody else the rest of your life, or to make a virtue of your peculiarities. Those who build walls are their own prisoners. I'm going to go fulfil my proper function in the social organism. I'm going to go unbuild walls.
Ursula K. Le GuinThat I was not dueling with the king, but trying to communicate with him, was itself an incommunicable fact.
Ursula K. Le GuinThe place they go towards is a place even less imaginable to us than the city of happiness. I cannot describe it at all. It is possible it does not exist. But they seem to know where they are going, the ones who walk away from Omelas.
Ursula K. Le GuinCertainly the effort to remain unchanged, young, when the body gives so impressive a signal of change as the menopause, is gallant; but it is a stupid, self-sacrificial gallantry, better befitting a boy of twenty than a woman of forty-five or fifty. Let the athletes die young and laurel-crowned. Let the soldiers earn the Purple Hearts. Let women die old, white-crowned, with human hearts.
Ursula K. Le GuinAs a kitten does what all other kittens do, so a child wants to do what other children do, with a wanting that is as powerful as it is mindless. Since we human beings have to learn what we do, we have to start out that way, but human mindfulness begins where that wish to be the same leaves off.
Ursula K. Le Guin