"A mathematician is a blind man in a dark room looking for a black cat which isn't there."

gefunden auf:
http://matheplanet.com/default3.html?call=viewtopic.php?topic=135339&ref=http%3A%2F%2Fwww.google.de%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D1%26cad%3Drja%26ved%3D0CDYQFjAA