What anxiety means is it's as though the world is knocking at your door, and you need to create, you need to make something, you need to do something. I think anxiety, for people who have found their own heart and their own souls, for them it is a stimulus toward creativity, toward courage. It's what makes us human beings.
... what the artist or creative scientist feels is not anxiety or fear; it is joy. I use the word in contrast to happiness or pleasure. The artist, at the moment of creating, does not experience gratification or satisfaction... Rather, it is joy, joy defined as the emotion that goes with heightened consciousness, the mood that accompanies the experience of actualizing one's own potentialities.
Joy is the zest that you get out of using your talents, your understanding, the totality of your being, for great aims...That's the kind of feeling that goes with creativity. That's why I say the courage to create. Creation does not come out of simply what you're born with. That must be united with your courage, both of which cause anxiety, but also great joy.