Being an interventional psychiatrist—watching people respond rapidly to treatments like transcranial magnetic stimulation, with measurable, specific mechanistic effects that translate directly into subjective experience—has only consolidated this stance. Interventions need to work, and we are best served when we understand exactly how, yet with the best of intentions, we have operated mainly without a coherent theory of how the objective and subjective are related. We are beginning to have the tools to build a better map—and to change the map and therefore change the terrain itself.