The earth spins so fast on its axis.
I watched the evidence this morning:
the shadow of a birdfeeder in transit
across a white wall.
It took less than half an hour
though I wasn’t timing it--
just watching.

There’s not much point to light all by itself, now is there?

It’s got to be caught by something, received by something, bounce off something to make much sense. Without shadow, light has no meaning.

No wonder there’s a universe. No wonder that we’re here. Without us, light has no purpose. We give light something to do. We define light for in our absence light has no definition.

I love this quote from Galileo Galilei:

The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.