Starting from theories on dreams, the innovative philosophical atmosphere of the Western 12th century are examined here. It is shown that the integration of Arabic medical know-how eventually opened perspectives which brought about the new interest in the Byzantine and Arabic Aristotle. Anhand der Traumtheorien untersucht der Autor das innovative philosophische Klima des lateinischen 12. Jahrhunderts. Es zeigt sich, dass die Aneignung arztlicher Fachbucher zu jenen neuen Perspectiven gefuhrt hat, die sich schliesslich im Interesse am byzantinischen und arabischen Aristoteles niedergeschlagen haben.

Thomas Ricklin, Dr. Phil. (1997), is an historian of Philosophy at the University of Freiburg (Switzerland), and co-author of the volume on the twelfth-century in the new Überweg. He took part in the edition and German translation of Dante's Philosophical works.