The two faces of anxiety.

Philosophers and Poets, from their perch on the cutting edge of reason, have always seen the advantage of anxiety. It is the “dizziness of reason,” argued Soren Kierkegaard; “the handmaiden of creativity,” said T.S. Eliot; “the beginning of conscience,” observed novelist Angela Carter. So have actors backstage, summoning eternal energies and edges for the roles they play, and sprinters on the block, finding hormonal springs in the fear of failure that allow them to achieve race times they never managed in practice.