He who never made a mistake, never made a discovery.Samuel Smiles
- The passion for seeking the truth for truth's sake...can be kept alive only if we continue to seek the truth for truth's sake.
- Race and Democratic Society (1945), introduction
- The behavior of an individual is determined not by his racial affiliation, but by the character of his ancestry and his cultural environment.
- Race and Democratic Society (1945), chapter 2
- No one has ever proved that a human being, through his descent from a certain group of people, must of necessity have certain mental characteristics.
- Race and Democratic Society (1945), chapter 7