Aktuelle Probleme der Polymer-Physik IV: Vorträge der Arbeitstagung des Fachausschusses Physik der Hochpolymeren im Rahmen der Frühjahrstagung des Arbeitskreises Festkörperphysik bei der Deutschen Physikalischen Gesellschaft vom 21.–23. März 1973 in Münst
“ This being human is a guest house. Every morning is a new arrival. A joy, a depression, a meanness, some momentary awareness comes as an unexpected visitor...Welcome and entertain them all. Treat each guest honorably. The dark thought, the shame, the malice, meet them at the door laughing, and invite them in. Be grateful for whoever comes, because each has been sent as a guide from beyond. ” ― Rumi