Invincible

I sit at my desk, hard at work
but a feeling - invincible mad -
has come over me. In all I do
in my nerve center there is a ringing glad
that just won't stop. The sun
is shining, the sky is blue:
all's well with the world...    It's
been like this other days too -
then why this warm orange glow,
this vermilion hue?
     And its not as if
I am even thinking of you.