TTTO:
*
Both Sides Now
*
, by Joni Mitchell

Extremely tiny billiard balls Exert a force on every wall. Moving much too fast to fall: I've looked at light that way. But now this doesn't seem to fit When looking through a double slit. And shadows blur a little bit With this peculiar ray. I've looked at light from both sides now: From speck and wave, and still somehow It's light's illusions I recall. I really don't know light, at all. Moving steady as can be With lots of simultaneity. A smooth increase in entropy: I've looked at time that way. But near the speed of light I've found All rates of change start slowing down. While antimatter turns things around And goes the other way. I've looked at time from both sides now: From where and when, and still somehow It's just equations I recall. I really don't know time, at all. Yellow, red, and sometimes blue Just u's and d's will nicely do To make protons and neutrons too. I've looked at quarks that way. But lambdas now are acting strange They're taking much too long to change But nothing's lost and nothing's gained During a strong decay. I've looked at quarks from both sides now: From up and down, and still somehow It's only hadrons I recall. I really don't know quarks, at all.