This volume is the first-ever collection of essays devoted to the Lurianic concept of tsimtsum. It contains eighteen studies in philosophy, theology, and intellectual history, which demonstrate the historical development of this notion and its evolving meaning: from the Hebrew Bible and the classical midrashic collections, through Kabbalah, Isaac Luria himself and his disciples, up to modernity (ranging from Spinoza, Böhme, Leibniz, Newton, Schelling, and Hegel to Scholem, Rosenzweig, Heidegger, Benjamin, Adorno, Horkheimer, Levinas, Jonas, Moltmann, and Derrida).