This Festschrift accompanies the award of the Honorary Doctorate to Professor Dr Nicholas P. Wolterstorff by the Vrije Universiteit Amsterdam on the 19th of October 2007. Seven scolars of the Vrije Universiteit discuss various aspects of Wolterstorff’s works. These scolars are Henk E.S. Woldring (ed.), Martijn Blaauw, Henk G. Geertsema, Siebren Miedema, Arend Soeteman, Wessel Stoker and René van Woudenberg. After their presentations Prof Wolterstorff responds and pays particular attention to the critical questions his colleagues addressed to him.