Father Karl Wallner, born 1963 in Vienna, has been a Cistercian monk at Stift Heiligenkreuz in Lower Austria’s Wienerwald since 1982. He is a professor for Dogmatics and Sacramental Theology of the Hochschule Heiligenkreuz, which he is also the head of. He is a counselor for teenagers and students in Heiligenkreuz and the author of several best-selling books. His most recent publications include “Faszination Kloster” (2011), “Wie ist Gott?” (2010), “Licht einer stillen Welt” (2010), “Der Gesang der Mönche” (2009) and “Wer glaubt wird selig” (2009).