"A drink of water," Arinix said. Mark dropped onto the metal bench in the brown room and nodded, too exhausted to talk. Arinix had a tray with glasses of water, and he passed one to Mark, who drained it and took a second one. The air was cool here, feeling frigid after the street outside, and with the water, he was soon feeling better. More relaxed, at ease, almost ready to fall asleep. As his chin touched his chest, he jerked awake and jumped to his feet.
"You drugged the water," he said.
"Not a strong drug. Just something to relax you, to remove the tension. You will be better in a moment. You have been through an ordeal."
"I have… and you are going to explain it!"
"In a moment."
"No, now!"
Mark wanted to jump to his feet, to take this strange man by the -throat, to shake the truth from him. But he did nothing. The desire was there, but only in an abstract way. It did not seem important enough to pursue such an energetic chain of events. For the first time he noticed that Arinix had lost his hairpiece during the recent engagement. He was as hairless as an egg, and the same scars that crisscrossed his face also extended over his bare skull. Even this did not seem important enough to comment upon. Awareness struck through,
"Your drug seems to be working."
"The effect is almost instantaneous."
"Where are we?"
"In New York City."
"Yes, I know, but so changed. The water in the streets, those soldiers, and the heat. It can't be January-have we traveled in time?"
"No, it is still January, the same day, month, year it has always been. That cannot be changed, that is immutable."
"But something isn't; something has changed. What is it?"
"You have a very quick mind, you make correct conclusions. You must therefore free this quick mind of all theories of the nature of reality and of existence. There is no heaven, there is no hell, the past is gone forever, the unstoppable future sweeps toward us endlessly. We are fixed forever in the now, the inescapable present of our world line-"
"What is a world line?"
"See… the drug relaxes, but your brain is still lawyer-sharp. You live in a particular present because of what happened in the past. Columbus discovered America, the armies of the North won the Civil War, Einstein stated that E = MC2"
He stopped abruptly, and Mark waited for him to go on, but he did not. Why? Because he was waiting for Mark to finish for him. Mark nodded.
"What you are waiting for is for me to ask if there is a world line where Columbus died in infancy, where the South won, and so forth. Is that what you mean?"
"I do. Now, carry the analogy forward."
"If two or three world lines exist, why, more, any number, an infinity of world lines can exist. Infinitely different, eternally separate." Then he was on his feet, shaking despite the drug. "But they are not separate. We are in a different one right now. There is a different world line beyond that door, down those steps-because the ground here is at a different height. Is that true?"
"Yes."
"But why, how… I mean, what is going on out there, what terrible thing is happening?"
"The sun is in the early stages of a change. It is getting warmer, giving out more radiation, and the polar ice caps are beginning to melt. The sea level has risen, drowning the lowest parts of the city This is midwinter, and you saw how warm it is out there. You can imagine what the tropics are like. There has been a breakdown in government as people fled the drowning shorelines. Others have taken advantage of it. The Union of South Africa has capitalized on the deteriorating conditions, and using mercenary troops, has invaded the North American continent. They met little resistance."
"I don't understand-or rather, I do understand what is happening out there, and I believe you, because I saw it for myself. But what can I do about it? Why did you bring me here?"
"You can do nothing about it. I brought you here because we have discovered by experience that the quickest way that someone can be convinced of the multiplicity of worldliness is by bringing them physically to a different world line."
"It is also the best-and quickest-way to discover if they can accept this fact and not break down before this new awareness."
"You have divined the truth. We are, unfortunately, short of time, so wish to determine as soon as possible if recruits will be able to work with us."
"Who is we?"
"In a moment I will tell you. First, do you accept the idea of the multiplicity of world lines?"
"I'm afraid I must. Outside is an inescapable fact. That is not a stage constructed to confuse me. Those dead men are dead forever. How many world lines are there?"
"An infinite number; it is impossible to know. Some differ greatly, some so slightly that it is impossible to mark the difference. Imagine them, if you will, as close together as cards in a pack. If two-dimensional creatures, cluba and hearts, lived on each card, they would be unaware of the other cards and just as unable to reach them. Continue the analogy, drive a nail through all of the cards. Now the other cards can be reached. My people, the 'we' you asked about, are the ones who can do that. We have reached many world lines. Some we cannot reach-some we dare not reach."
"Why?"
"You ask why-after what you saw out there?" For the first time since they had met, Arinix lost his cold detachment. His single eye blazed with fury, and his fists were clenched as he paced the floor. "You saw the filthy things that happen, the death that comes before the absolute death. You see me, and I am typical of my people, maimed, killed, and scarred by a swollen sun that produces more and more hard radiation every year. We escaped our world line, seeking salvation in other world lines, only to discover the awful and ultimate secret. The rot is beginning, going faster and faster all the time. You saw what the world is like beyond that door. Do you understand what I am saying, do the words make any sense to you?
"The sun is going nova. It is the end."