What separates this observation from mere optimism about positive thinking is Einstein's claim that reality itself is *structured* by our conceptual frameworks—not merely that attitude matters. We don't simply choose to see the glass half-full; we've already decided, collectively, what counts as a glass, fullness, and worth measuring. Consider how the invention of the germ theory of disease didn't just change our *attitude* toward sanitation; it literally reorganized hospitals, cities, and social behavior because we'd altered the fundamental category of what causes illness. The unsettling implication is that we can't step outside our current thinking to see what we're missing—we can only think our way into a different prison.