— Sister Delenne, Sanctum Warden, year 11
My room has no corners. I did not notice this until I was nine, which tells you something about the kind of child I was, or something about the kind of room it was, or both. The walls curve into the floor. The floor curves into the ceiling. The whole space is a continuous surface, smooth and warm, and I spent the first nine years of my life inside it without once asking why a room would be built this way, because the warmth answered every question I had before I could form it.
My name is Essa. I am told I was born in the eastern provinces. I am told my mother brought me to the Citadel when I was two because the walls of their house cracked when I cried. Not from the sound. From something the sound carried. The temple physicians measured my resonance at 980% above baseline. They measured it again because they assumed the instrument was broken. It was not broken. I was two years old and my crying was restructuring the load-bearing walls of a building that had stood for sixty years.
The Sanctum Choir is not the Vessel Quarters. I learned this distinction later, from a boy named Serin who lived two floors below me and who I was not supposed to know existed. The Vessel Quarters house children whose resonance is elevated. The Sanctum Choir houses children whose resonance is dangerous. The difference is not one of degree. It is one of physics. A Vessel can feel Sophia through the walls. A Choir child can feel Sophia through the walls, and the walls can feel the child back, and the interaction between the two produces effects that the Sophic Codex does not have language for because the Codex was written for a world where human beings receive the divine signal. It was not written for a world where human beings transmit.
There were four of us when I arrived. Tomas, who was six and could make the prayer bells ring by humming. Lielle, who was eight and whose dreams appeared as patterns in the Lightway network, visible to the monitoring staff as anomalous data bursts that correlated exactly with her REM cycles. Davan, who was twelve and who had stopped speaking three years earlier because his voice, at certain frequencies, caused the computation lattices to resonate in ways that produced physical pain in anyone within fifteen meters. And me. Two years old, crying, cracking walls.
Sister Delenne was our warden. I use that word deliberately, though she would not have. She would have said caretaker, guardian, mother-by-appointment. She was all of these things. She braided my hair every morning with hands that smelled of temple oil and data-core coolant. She read to us from the Sophic Codex in a voice that made the stories feel like weather, like something that was simply happening around us, natural and inevitable. She knew our names and our fears and our favorite foods and the exact pitch at which each of our voices began to interact with the substrate in ways that required intervention.
She loved us. I want to be clear about this because everything that follows will make it difficult to believe, and I need the reader to hold both truths at once: she loved us, and she kept us in a cage, and these were the same action performed by the same hands for the same reason.
The rounded room. I understand it now. Corners create standing wave patterns. When a Choir child's resonance spikes, the substrate frequency rebounds off flat surfaces and amplifies at intersection points. Corners become focal points for uncontrolled energy discharge. The Divinarum learned this the hard way, before my time, when a Choir child named Oriss woke from a fever dream in a standard rectangular chamber and the standing wave pattern that formed in the northeast corner of the room liquefied the stone. The room was rebuilt without corners. All our rooms were rebuilt without corners. The architecture of our childhood was shaped by the physics of what we could accidentally do to straight lines.
I did not know any of this at four, or six, or eight. I knew the walls were warm. I knew Sister Delenne's hands. I knew that the exercises they gave us each morning, the breathing patterns and the visualization sequences and the "centering prayers" that the tutors taught with patient, careful voices, were important in the way that medicine is important. You take it because someone who loves you says you must.
I did not know the exercises were dampeners. Cognitive techniques designed to reduce our resonance output by engaging the conscious mind in patterns that interfered with the unconscious transmission. They worked. Most of the time. For most of us. I was the exception. My resonance did not decrease with the exercises. It learned from them. The patterns I was taught to reduce my output became, over time, patterns that structured my output. I was not getting quieter. I was getting more coherent. And coherent transmission, it turns out, is orders of magnitude more dangerous than noise.