‘Have you? Think. All I did was move your consciousness along your time-line. I can take you into your past, and a little way – only a little way – into your future. In the same way we can refract light through time, by means of the time-gems. Yes, the past and the future can be known. But as for altering anything – no. Does this sound like a paradox? It isn’t really. I shall explain. As you have guessed, we are four-dimensional beings. But only in a sense. We have learned to do what I did for you – to move back and forth over our time-lines, though only to a limited degree into the future. No time transfer was involved in bringing you into this dwelling, incidentally. We merely put you through a displacement vortex, which is our normal way of travelling about the planet.
‘You might think that the foreknowledge this gives us, by governing our actions, enables us to control and alter future time – but no. Everything that happens in my future is already a result of this foreknowledge. It cannot be changed. Our time-travelling ability is, itself, part of the predestined cosmic pattern.’
Boaz stared at the ibis-headed man, a familiar burdensome feeling coming over him. ‘What is the good of such a faculty?’ he asked.
‘It adds an extra dimension to life, as you can appreciate. To return to the past is more efficient than memory, which is apt to be unreliable. Experience of the future is also more useful than mere prediction.’
‘You have some machinery for accomplishing this mental projection through time?’
‘It is a mental discipline. There is no machinery for it.’
‘Would you teach it to me?’
‘You could never learn it. Your brain is too different.’
The right adplants, or else the right silicon bones, might rectify that, Boaz thought. But if what he had just been told was true, there would probably be little point in it. The time-gems in his pocket still seemed to offer him most hope. Whatever the ibis-headed man said, they were proof that there
‘Then I thank you for your information. I would like to leave now.’
‘No, you cannot leave yet, Joachim Boaz. I have something more to tell you.’
The ibis-headed man shifted slightly. His head turned, as if to glance at something on the wall, and for a moment Boaz saw the strange face in profile, looking exactly like the Egyptian bird in the colonnader card.
‘Let me tell you what brought you here, what brought all the others here who landed in the last few hours. You see, I am very old. My species conquered the aging process long ago. My body will die only when accidental and unrepairable damage on the cellular level reaches a lethal accumulation – which will happen eventually, of course. Now, beings that live a long time are liable to develop special hobbies, so as to while away the period of their existence. My hobby is alien psychology. As our steerable planet wanders through the galaxy I made it my business to study the mental features of the various species we come across from time to time. This, let me add, is my own hobby. My friends and colleagues, some of whom you have just met, follow other interests…
‘But to come back to the point, Joachim Boaz. We have been in this star cluster for a while now, long enough for me to notice that your species possesses a certain psychological peculiarity. This quirk could be summed up as
‘So I decided to collect a few suitable specimens for study. Ordinary specimens were no good, I wanted those in whom this obsessive quirk is developed to a high degree. So I set up a
‘Then those people – are still alive?’