 Feyerabend does not tell us how he became acquainted with another one of his main preoccupations—singing. He was proud of his voice, becoming a member of a choir, and took singing lessons for years, later claiming to have remained in California in order not to have to give up his singing teacher. In his autobiography he talks of the pleasure, greater than any intellectual pleasure, derived from having and using a well-trained singing voice (p. 83). During his time in Vienna in the second world war, his interest led him to attend the opera (first the Volksoper, and then the Staatsoper) together with his mother. A former opera singer, Johann Langer, gave him singing lessons and encouraged him to go to an academy. After passing the entrance examination, Feyerabend did so, becoming a pupil of Adolf Vogel. At this point in his life, he later recalled: 