"How can you treat death so lightly?" she asks. "Because it happens," he replies. "It is inevitable. I do not mourn the falling of a leaf or the brea… - Roger Zelazny

The Hellenic world did not view the passage of time as we do. History was considered in an episodic sense, as the struggles of an unchanging mankind against a relentless and unchanging fate. The slow process of organic evolution had not yet been detected, and the grandest model for a world view was the seeming changeless patterning of the stars. It took the same processes that set the stage for science fiction—eighteenth-century rationalism and nineteenth-century science—to provide for the first time in the history of the world a sense of historical direction, of time as a developmental, nonrepetitive sequence.
This particular world view became a part of science fiction in a far more explicit fashion than in any other body of storytelling, as it provided the basis for its favorite exercise: extrapolation. I feel that because of this, science fiction is the form of literature least affected by Aristotle’s dicta with respect to the nature of the human condition, which he saw as immutable, and the nature of man’s fate, which he saw as inevitable.

In the mirrors of the many judgments, my hands are the color of blood. I sometimes fancy myself an evil which exists to oppose other evils; and on that great Day of which the prophets speak but in which they do not truly believe, on the day the world is utterly cleansed of evil, then I too will go down into darkness, swallowing curses. Until then, I will not wash my hands nor let them hang useless.

Of all the things a man may do, sleep probably contributes most to keeping him sane. It puts brackets about each day. If you do something foolish or painful today, you get irritated if somebody mentions it, today. If it happened yesterday, though, you can nod or chuckle, as the case may be. You've crossed through nothingness or dream to another island in Time.