Going On Valentine

And time which is the shadow
Of a realer world goes on
Breathing us in and out
Expanding and contracting us
But she who is doing the thinking
Is already outside the cave
Outside the brain itself
Where thinking comes in
Like the very I of spring
Or the not-I of fall
Throwing itself at your feet
All the effort time takes
To impress itself on things
That hardly matter
While thinking goes on