Sit here, and you are being held up by a war of electrons that has no intention of stopping.
Your weight presses down. The wooden slats do not yield, and you might think this means they are pushing back, that some solid thing is resisting some solid thing. But there is almost nothing solid here. An atom is essentially empty; if the nucleus were a marble on the pitcher's mound, the electrons would haze the outfield fences, and everything between is void.
You are mostly void, resting on mostly void. What actually stops you from passing straight through the bench is that the electrons in your body and the electrons in the wood refuse, categorically, to occupy the same state. That refusal, silent and absolute, is the entire sensation of sitting down.
The wood itself is stored sunlight. Every board was once a tree that spent decades pulling carbon out of the air and bolting it together with photons that left the surface of the Sun eight minutes before a leaf caught them. The bench is a solid slab of captured afternoons.
And it is falling apart, gorgeously, on schedule. The peeling paint, the gray weathering, the slight give in the third slat: that is the second law of thermodynamics made visible, energy dispersing, order leaking into disorder, exactly as the universe insists it must. No one can build a bench that lasts forever, because forever runs the wrong way.
The carbon in these boards was forged inside a dying star and flung across the galaxy before the Earth existed. It drifted, coalesced, became a tree, became a plank, became a place to rest your legs.
You came to the park to sit down for a minute.
You are perched on ancient starlight, suspended half an inch above nothing by a law that has never once made an exception.