Perhaps the single most controversial rabbinic leader in recent Jewish history, Rav Kook viewed the rise of secularism and modernity as a phase in a historical process that would eventually lead to redemption. Delving into the kabbalistic ideas in Rav Kook's book "Orot", Rabbi Wein explains this revolutionary worldview and shows how Rav Kook applied his principles in his halachic rulings and in his relations with the secular Zionist movement.