The Voice said, “Even if I knew everything, I could not know that I know everything.”

Murray said, “That sounds like a bit of Eastern philosophy – something that sounds profound precisely because it has no meaning.”

The Voice said, “You have promise. You answer my paradox with a paradox – except that mine is not a paradox. Consider. I have existed eternally, but what does that mean? It means I cannot remember having come into existence. If I could, I would not have existed eternally. If I cannot remember having come into existence, then there is at least one thing – the nature of my coming into existence – that I do not know.

“Then, too, although what I know is infinite, it is also true that what there is to know is infinite, and how can I be sure that both infinities are equal? The infinity of potential knowledge may be infinitely greater than the infinity of my actual knowledge. Here is a simple example: If I knew every one of the even integers, I would know an infinite number of items, and yet I would still not know a single odd integer.”

Murray said, “But the odd integers can be derived. If you divide every even integer in the entire infinite series by two, you will get another infinite series which will contain within it the infinite series of odd integers.”

The Voice said, “You have the idea. I am pleased. It will be your task to find other such ways, far more difficult ones, from the known to the not-yet-known. You have your memories. You will remember all the data you have ever collected or learned, or that you have or will deduce from that data. If necessary, you will be allowed to learn what additional data you will consider relevant to the problems you set yourself.”

“Could you not do all that for yourself?”

The Voice said, “I can, but it is more interesting this way. I constructed the Universe in order to have more facts to deal with. I inserted the uncertainty principle, entropy, and other randomisation factors to make the whole not instantly obvious. It has worked well for it has amused me throughout its entire existence.

“I then allowed complexities that produced first life and then intelligence, and use it as a source for a research team, not because I need the aid, but because it would introduce a new random factor. I found I could not predict the next interesting piece of knowledge gained, where it would come from, by what means derived.”

Murray said, “Does that ever happen?”

“Certainly. A century doesn’t pass in which some interesting item doesn’t appear somewhere.”

“Something that you could have thought of yourself, but had not done so yet?”

“Yes.”

Murray said, “Do you actually think there’s a chance of my obliging you in this manner?”

“In the next century? Virtually none. In the long run, though, your success is certain, since you will be engaged eternally.”

Murray said, “I will be thinking through eternity? Forever?”

“Yes.”

“To what end?”

“I have told you. To find new knowledge.”

“But beyond that. For what purpose am I to find new knowledge?”

“It was what you did in your Universe-bound life. What was its purpose then?”

Murray said, “To gain new knowledge that only I could gain. To receive the praise of my fellows. To feel the satisfaction of accomplishment knowing that I had only a short time allotted me for the purpose. – Now I would gain only what you could gain yourself if you wished to take a small bit of trouble. You cannot praise me; you can only be amused. And there is no credit or satisfaction in accomplishment when I have all eternity to do it in.”

The Voice said, “And you do not find thought and discovery worthwhile in itself? You do not find it requiring no further purpose?”

“For a finite time, yes. Not for all eternity.”

“I see your point. Nevertheless, you have no choice.”

“You say I am to think. You cannot make me do so.”

The Voice said, “I do not wish to constrain you directly. I will not need to. Since you can do nothing but think, you will think. You do not know how not to think.”

“Then I will give myself a goal. I will invent a purpose.”

The Voice said tolerantly, “That you can certainly do.”

“I have already found a purpose.”

“May I know what it is?”

“You know already. I know we are not speaking in the ordinary fashion. You adjust my nexus is such a way that I believe I hear you and I believe I speak, but you transfer thoughts to me and from me directly. And when my nexus changes with my thoughts you are at once aware of them and do not need my voluntary transmission.”

The Voice said, “You are surprisingly correct. I am pleased. – But it also pleases me to have you tell me your thoughts voluntarily.”

“Then I will tell you. The purpose of my thinking will be to discover a way to disrupt this nexus of me that you have created. I do not want to think for no purpose but to amuse you. I do not want to think forever to amuse you. I do not want to exist forever to amuse you. All my thinking will be directed toward ending the nexus. That would amuse me.”

The Voice said, “I have no objection to that. Even concentrated thought on ending your own existence may, in spite of you, come up with something new and interesting. And, of course, if you succeed in this suicide attempt you will have accomplished nothing, for I would instantly reconstruct you and in such a way as to make your method of suicide impossible. And if you found another and still more subtle fashion of disrupting yourself, I would reconstruct you with that possibility eliminated, and so on. It could be an interesting game, but you will nevertheless exist eternally. It is my will.”

Murray felt a quaver but the words came out with a perfect calm. “Am I in Hell then, after all? You have implied there is none, but if this were Hell you would lie to us as part of the game of Hell.”

The Voice said, “In that case, of what use is it to assure you that you are not in Hell? Nevertheless, I assure you. There is here neither Heaven nor Hell. There is only myself.”

Murray said, “Consider, then, that my thoughts may be useless to you. If I come up with nothing useful, will it not be worth your while to – disassemble me and take no further trouble with me?”

“As a reward? You want Nirvana as the prize of failure and you intend to assure me failure? There is no bargain there. You will not fail. With all eternity before you, you cannot avoid having at least one interesting thought, however you try against it.”

“Then I will create another purpose for myself. I will not try to destroy myself. I will set as my goal the humiliation of you. I will think of something you have not only never thought of but never could think of. I will think of the last answer, beyond which there is no knowledge further.”

The Voice said, “You do not understand the nature of the infinite. There may be things I have not yet troubled to know. There cannot be anything I cannot know.”

Murray said thoughtfully, “You cannot know your beginning. You have said so. Therefore you cannot know your end. Very well, then. That will be my purpose and that will be the last answer. I will not destroy myself. I will destroy you – if you do not destroy me first.”

The Voice said, “Ah! You come to that in rather less than average time. I would have thought it would have taken you longer. There is not one of those I have with me in this existence of perfect and eternal thought that does not have the ambition of destroying me. It cannot be done.”

Murray said, “I have all eternity to think of a way of destroying you.”

The Voice said, equably, “Then try to think of it.” And it was gone.

But Murray had his purpose now and was content.

For what could any Entity, conscious of eternal existence, want – but an end?

For what else had the Voice been searching for countless billions of years? And for what other reason had intelligence been created and certain specimens salvaged and put to work, but to aid in that great search? And Murray intended that it would be he, and he alone, who would succeed.

Carefully, and with the thrill of purpose, Murray began to think.

He had plenty of time.