"A little over twelve hundred cubic meters."
"What a brain! And it is mine?"
"You are an adjunct to it, a runner for it, an appendage, inasmuch as you are anything at all."
"Colonel Cooper, how long have I been alive?"
"You are not."
"How long have I been as I am now?"
"It is three days since you were last reassigned, since you were assigned to this. At that time your nervousness and apprehensions were introduced. An apprehensive unit will be more inclined to notice details just a little out of the ordinary."
"And what is my purpose?"
They were walking now back to the office work area, and Anthony had a sad feeling at leaving his brain behind him.
"This is a filter center, and your purpose is to serve as a filter, of a sort. Every person has a slight aura around him. It is a characteristic of his, and is part of his personality and purpose. And it can be detected, electrically, magnetically, even visually under special conditions. The accumulator at which we were looking (your brain) is designed to maintain contact with all the auras in the world, and to keep a running and complete data on them all. It contains a multiplicity of circuits for each of its three billion and some subjects. However, as aid to its operation, it was necessary to assign several artificial consciousnesses to it. You are one of these."