A brilliant full moon is casting cold clear light straight through the curtains and onto the bare floor. I look up, startled and shivering, thinking: What a mess to clean up!
But then I awaken. Bolting up in the dark I see that the floor is clean. No light has spilled anywhere. The moon has since moved westward in the night sky and the angle of its light no longer touches the floor. I sigh in relief, thinking: Nothing to clean. Not one speck of dust.