You live, safe, within an impenetrable metal box. Nothing from the outside can break the box. It shrugs off bullets. A freight train would bounce off.
But you've become trapped in it, crushed by it.
Deep in your heart you know the box will break into a million pieces if you so much as stand up straight.
Is it worth leaving its safety? Ask yourself: when was the last time you took a bullet? When was the last time you were hit by a speeding train?
Expand. Step out into the light.