The Simplest of All Regrets

I’m in one right now—
one of those days that will never
come again. The brown puzzle pieces
of oak leaves scattered
over the sidewalk, and the sunrise
stretching itself into a long,
luxurious thing. And you
sitting across from me laughing
to yourself about something
on your phone, totally unaware
of the alchemical morning light
against your cheek. 
Please body! Please mind! 
Wake fully into this moment. 
How many days already
have I lost to that simplest
of all regrets: If only I had been
more present.