Moosic just shook his head in wonder, still not quite believing all this. “I find it all impossible to accept. What was was, that’s all. You can’t recapture a moment that’s past.”

“And so I was raised to believe. As the poor two-dimensional creature in Abbott’s Flatland could not accept depth, so we cannot accept but a single perspective of time. In a way, it’s like motion. We know we’re in motion because of a lot of phenomena and reference points. We move in relation to something else. Yet the Earth is now turning at around twenty-five thousand miles per hour and we can’t feel it. It’s going around the sun at an even greater speed, and we can’t feel or sense that, either. The sun, in turn, is going around the galactic center, and so on. Since all that is around us, including us, is moving at the same speed and in the same way, we cannot sense that motion and speed relative to us. Since we are going forward in time, all of us at the same rate and everything else around, we cannot really relate to time in any way except as the progress of one moment to the next. But it’s all there—the past is forever. We are immortal, Mr. Moosic. We exist forever frozen in our past moments.”

“But time is… immutable.”

“Oh, so? Even before we knew that it was not so. Einstein showed it. Time is relative to mass and velocity. The closer you approach the speed of light, the slower your time is relative to the universe. Time also gives way around areas of heavy gravity—suns, to a small extent, and black holes to an enormous extent. No, it’s not the fact that time is malleable that is the stunner. Apply enough power, it seems, and time will finally give. Rather, the shock is that time exists as a continuum, a series of events running in a continous stream from the Big Bang all the way to the future. How far we don’t know—we can’t figure out how to go into the future relative to our own time. It may be possible that far future scientists can go past today, but we cannot. But the past record is there, and it is not merely a record: it’s a reality. Now you understand the need for security.”