The Role of Anxiety in Making Art

Anxiety is the hand maiden of creativity. (T. S. Eliot)

REMBRANDT - Portrait of a Young Woman
  1632-   Oil on canvas, 92 x 71 cm

So this week I am taking a painting workshop with my former teacher.
Of course, I am a little anxious about it.
I have prepared all my materials, and packed my bag.
But the anxiety is still there.
I really don't know why, because I have taken classes with him before.
I guess it's just the fear of the unknown.
And, like most artists, I am worried about my skill level.
I am sure everything will turn out well.
But anxiety keeps me focused, alert, and ready to act.

How does anxiety factor into your work?