Behind the Locked Door: Why Protecting Your Heart Is Killing You: episode is a deep dive into the hidden physical and psychological toll of self-isolation — the kind of withdrawal that hides in plain sight behind competence, busyness, and charm. Starting from C.S. Lewis's warning in The Four Loves that a heart locked away for safekeeping doesn't stay intact but grows "unbreakable, impenetrable, irredeemable," we trace that insight through the modern science of loneliness: the attachment research explaining why we first build the wall, the neuroscience showing how an isolated brain gets stuck scanning for threats that aren't there, and the mortality data proving that chronic disconnection is as dangerous to the body as smoking. We name the disguises isolation wears — the tireless helper, the chronically busy, the fiercely ...