On this unique occasion I should first like to express my personal thanks for being allowed to take part, although I do not belong to those students who have developed philosophically the direction which you began. If I nevertheless feel like one of your students, the reason does not lie in my positive acceptance of your inquiry into Being. It lies, rather, in the fact that you were the only teacher who permitted me to experience what a philosophical lecture can offer in forcefulness and concentration, and that during the confusion following the First World War, you gave me decisive incentives for self-reflection, made stiff demands, set standards, and opened up perspectives.