Why should I spend time in nature when I live in a concrete city?

Because your body knows something your schedule forgets. Time in green, even small amounts, genuinely changes your nervous system. Not metaphorically—measurably. Blood pressure shifts, stress hormones ease, attention sharpens. But that's not the real reason. The deeper reason is about paradox. Nasreddin Hodja understood this: sometimes the answer to a problem is its opposite. In a city of constant stimulation, nature offers nothing—and that nothing feeds something essential. You can't achieve or optimize a tree. You can only be near it. There's humor too, once you start looking. A wild plant thriving in terrible concrete conditions, a bird that's learned to cross streets, an ant colony under a busy sidewalk—these are nature's jokes at our expense, and they're worth laughing at. They remind us we're not entirely in control, and somehow that's liberating. The examined joyful life isn't about escaping your real circumstances. It's about discovering what's already alive in them. Even ten minutes noticing one small growing thing shifts something. It's not about guilt or should. It's about the quiet pleasure of remembering you're part of something vast and persistent, even here, especially here.