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 b...