I’m wondering how to keep moving through a day that began with a 3:40 a.m. run to Dulles International Airport. I was okay after returning home to sleep three more hours, energetic enough to tackle a yoga class and a warm walk around Lake Anne. But now lunch is over and my head feels stuffed with cotton.

I’m in search of momentum. By all rights I should be cleaning closets or pulling weeds, tasks that would keep me awake, but here I sit, laptop in lap, ready to do some online research.

Let’s see if it’s scintillating enough to keep me vertical.

(The scintillating stairway at the Tate Gallery in London.)