To me it is a riddle that Knut Wicksell, who for most of his life was a fanatical representative of extreme opinions in the social debate, could present a completely different personality in the scholarly context. During the period when I knew him he was the diffident seeker after scientific truth.
Bertil Ohlin (1972, 558), as cited in: Carlson, Benny, and Lars Jonung. "Knut Wicksell, Gustav Cassel, Eli Heckscher, Bertil Ohlin and Gunnar Myrdal on the role of the economist in public debate." Econ Journal Watch 3.3 (2006): 511-550.