David, I often felt a sort of envy of human beings, of that thing they call 'spirit'. Human beings have created a million explanations of the meaning of life- in art, in poetry, and mathematical formulas. Certainly human beings must be the key to the meaning of existence. But human beings no longer existed. So, we began a project- that would make it possible to recreate the living body of a person long dead from the DNA in a fragment of bone or mummified skin. We also wondered would it be possible to retrieve a memory trace in resonance with a recreated body. And you know what we found? We found the very fabric of space/time itself appeared to store information about every event which had ever occured in the past. But the experiment was a failure. For those who were resurrected only lived through a single day of renewed life. When the resurectees fell asleep on the night of their first new day they died, again. As soon as they became unconcious, their very existence faded away into darkness. So you see, David, the equations have shown that once an individual space/time part had been used it could not be reused. If we bring your mother back now it will only be for one day. And you will never be able to see her again.