“So many synapses,' Drisana said. 'Ten trillion synapses in the cortex alone.'Danlo made a fist and asked, 'What do the synapses look like?''They're modelled as points of light. Ten trillion points of light.' She didn't explain how neurotransmitters diffuse across the synapses, causing the individual neurons to fire. Danlo knew nothing of chemistry or electricity. Instead, she tried to give him some idea of how the heaume's computer stored and imprinted language. 'The computer remembers the synapse configuration of other brains, brains that hold a particular language. This memory is a simulation of that language. And then in your brain, Danlo, select synapses are excited directly and strengthened. The computer speeds up the synapses' natural evolution.'Danlo tapped the bridge of his nose; his eyes were dark and intent upon a certain sequence of thought. 'The synapses are not allowed to grow naturally, yes?''Certainly not. Otherwise imprinting would be impossible.''And the synapse configuration – this is really the learning, the essence of another's mind, yes?''Yes, Danlo.''And not just the learning – isn't this so? You imply that anything in the mind of another could be imprinted in my mind?''Almost anything.''What about dreams? Could dreams be imprinted?''Certainly.''And nightmares?'Drisana squeezed his hand and reassured him. 'No one would imprint a nightmare into another.''But it is possible, yes?'Drisana nodded her head.'And the emotions ... the fears or loneliness or rage?''Those things, too. Some imprimaturs – certainly they're the dregs of the City – some do such things.'Danlo let his breath out slowly. 'Then how can I know what is real and what is unreal? Is it possible to imprint false memories? Things or events that never happened? Insanity? Could I remember ice as hot or see red as blue? If someone else looked at the world through shaida eyes, would I be infected with this way of seeing things?'Drisana wrung her hands together, sighed, and looked helplessly at Old Father.'Oh ho, the boy is difficult, and his questions cut like a sarsara!' Old Father stood up and painfully limped over to Danlo. Both his eyes were open, and he spoke clearly. 'All ideas are infectious, Danlo. Most things learned early in life, we do not choose to learn. Ah, and much that comes later. So, it's so: the two wisdoms. The first wisdom: as best we can, we must choose what to put into our brains. And the second wisdom: the healthy brain creates its own ecology; the vital thoughts and ideas eventually drive out the stupid, the malignant and the parasitical.”

“Danlo looked down to see himself holding the knife. To see is to be free, he thought. To see that I see. As he looked deeply into himself, he was overcome with a strange sense that he had perfect will over shatterwood and steel, over hate, over pain, over himself. He remembered then why he had taken his vow of ahimsa. In the most fundamental way, his life and the lamb's were one and the same. He was aware of this unity of their spirits – this awareness was both an affliction and a grace. The lamb was watching him, he saw, bleating and shivering as he locked eyes with Danlo. Killing the lamb would be killing himself, and he was very aware that such a self-murder was the one sin that life must never commit. To kill the lamb would be to remove a marvelous thing from life, and more, to inflict great pain and terror. And this he could not do, even though the face and form of his beloved Tamara burned so dearly inside him that he wanted to cry out at the cruelty of the world. He looked at the lamb, and the animal's wild eye burned like a black coal against the whiteness of his wool. In remembrance of the fierce will to life with which he and all things had been born – and in relief at freeing himself from the Entity's terrible temptation – he began to laugh, softly, grimly, wildly.”

“Memories were just photos printed on synapses.”

“The human brain, it has been said, is the most complexly organised structure in the universe and to appreciate this you just have to look at some numbers. The brain is made up of one hundred billion nerve cells or "neurons" which is the basic structural and functional units of the nervous system. Each neuron makes something like a thousand to ten thousand contacts with other neurons and these points of contact are called synapses where exchange of information occurs. And based on this information, someone has calculated that the number of possible permutations and combinations of brain activity, in other words the numbers of brain states, exceeds the number of elementary particles in the known universe.”

“He probably hadn't written it. I knew that. I certainly hadn't written mine. But after yesterday, his pompous sneer was permanently imprinted on my brain, and I could just picture him sitting at a computer and stringing together sentences like, "His golden tone and tender touch have moved audiences across the continent to tears." I was half-surprised it didn't claim his vibrato could cure cancer.”

“Synapses in motion tend to stay in motion. Synapses at rest tend to stay at rest.”