@article{Salzmann, author = {Salzmann, M. de}, title = {Man's Ever New and Eternal Challenge}, series = {J. Needleman and D. Lewis (Eds.), On the Way to Self Knowledge, New York (Alfred A. Knopf) 1976, pp. 54-83}, journal = {J. Needleman and D. Lewis (Eds.), On the Way to Self Knowledge, New York (Alfred A. Knopf) 1976, pp. 54-83}, language = {en} }