“We have time travel," she said, "and none of us, I am sure, really understands it. We stole it from the Infinites. To steal time travel was the one way we could fight back, the one way we could flee. The human race had far space travel before the Infinites showed up. I think it was our far travel that aroused the interest of the Infinites in us. I've often wondered if some of the very primitive principles of time might not have made our many-times-faster-than-light travel possible. Time is somehow tied into space, but I have never known quite how.”

“You mean old books?"

"Stories written before space travel but about space travel."

"How could there have been stories about space travel before --"

"The writers," Pris said, "made it up.”

“Then the theory of relativity came and explained the cause of the failure. Electric action requires time to travel from one point of space to another, the simplest instance of this being the finite speed of travel of light… Thus electromagnetic action may be said to travel through space and time jointly. But by filling space and space alone [excluding time] with an ether, the pictorial representations had all supposed a clear-cut distinction between space and time.”

“I wonder if time-traveling cultures are playing with us. I wonder if they process our history for entertainment values.”

“We cannot change the past even if we could go back in time. The fabric of space-time continuum may automatically correct anomalies caused by, say, a time traveler such that any ripple effects are short-lived.”

“We have traveled through space and time. We have been many places. Visited many worlds. And there is good news: the acoustics everywhere are terrific.”

“What if I travel so far away in my dreams that I can't get back in time to wake up?”

“We have travelled far from the standpoint which identifies the real with the concrete. Even the older philosophy found it necessary to admit exceptions; for example, time must be admitted to be real, although no one could attribute to it a concrete nature.”

“The Gran Sasso results could be seen as tentatively offering support for the big bang theory – if we could find a way to test that they are indeed travelling backwards in time.”

“We are what our thoughts have made us; so take care about what you think. Words are secondary. Thoughts live; they travel far.”