Trauma is not an objective property of an event but a subjective experience created by the relationship between a present situation and past memories. Because experience is a combination of sensory input and remembered past, changing the meaning or narrative of past events can change the experience of trauma itself.
Our perception of sensing then reacting is an illusion. The brain constantly predicts the next moment based on past experiences, preparing actions before sensory information fully arrives. This predictive process is far more efficient than constantly reacting to the world from scratch, meaning we act first, then sense.
Training methods leverage the brain's predictive nature. Repetitive practice makes the brain efficient at predicting movements, leading to mastery and lower energy use ('muscle memory'). In contrast, unpredictable training creates constant prediction errors, forcing adaptation and burning more calories, which drives growth and resilience.
You cannot simply think your way out of a deep-seated fear, as it is an automatic prediction. To change it, you must systematically create experiences that generate "prediction error"—where the feared outcome doesn't happen. This gradual exposure proves to your brain that its predictions are wrong, rewiring the response over time.
Physiological responses, like a caffeine-withdrawal headache, occur because the brain predicts an event (coffee intake) and preemptively adjusts the body's state (dilating blood vessels). When the expected event doesn't happen, the preparatory physical action causes symptoms. This shows how expectation directly drives our physical reality.
Since the brain builds future predictions from past experiences, you can architect your future self by intentionally creating new experiences today. By exposing yourself to new ideas and practicing new skills, you create the seeds for future automatic predictions and behaviors, giving you agency over who you become.