John Sallis is Frederick J. Adelmann Professor of Philosophy at Boston College. He is author of more than twenty books, including Chorology, Songs of Nature, and Kant and the Spirit of Critique. Jeffrey Powell is professor of Philosophy at Marshall University. He is the editor of Heidegger and Language and coeditor of Aesthetic Reason and Imaginative Freedom: Friedrich Schiller and Philosophy. He is cotranslator of Heidegger's The History of Beyng.