I once saw Carlin perform at the late-great Circle Star Theater in Redwood City, CA when I was a teenage in the 1980s. He had always been a favorite of mine. Here's one of his later gems which puts everything into perspective:
“The planet has been through a lot worse than us. Been through all kinds of things worse than us. Been through earthquakes, volcanoes, plate tectonics, continental drift, solar flares, sun spots, magnetic storms, the magnetic reversal of the poles … hundreds of thousands of years of bombardment by comets and asteroids and meteors, worlwide floods, tidal waves, worldwide fires, erosion, cosmic rays, recurring ice ages … And we think some plastic bags, and some aluminum cans are going to make a difference? The planet … the planet … the planet isn’t going anywhere. WE ARE!”
-George Carlin