The twentieth-century was a time of tremendous upheaval and unspeakable tragedy for the Jewish communities of Europe. But the past hundred years were also a period of great renewal for Jewish spirituality, a renaissance that has continued into the present day. We will explore the mystic writings of figures from the Safed Renaissance, the Hasidic masters, with a particular focus on the works of Martin Buber, Hillel Zeitlin, Abraham Isaac Kook, Abraham Joshua Heschel, and Arthur Green. We will examine their teachings in light of the challenges of the two World Wars, the Holocaust, and the processes of modernity and secularism. Consideration will be made of the unique cultural contexts of modern Israel and contemporary America.