If we were to select the most intelligent, imaginative, energetic, and emotionally stable third of mankind, all races would be present.

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.

Furthermore, the study of the present surroundings is insufficient: the history of the people, the influence of the regions through which it has passed on its migrations, and the people with whom it came into contact, must be considered

In France, that let down the barriers more than a hundred years ago, the feeling of antipathy is still strong enough to sustain an anti-Jewish political party

Remember that in every single case in history the process of adaptation has been one of exceeding slowness. Do not look for the impossible, but do not let your path deviate from the quiet and steadfast insistence on full opportunities for your powers.

There is no fundamental difference in the ways of thinking of primitive and civilized man. A close connection between race and personality has never been established.

The existence of any pure race with special endowments is a myth, as is the belief that there are races all of whose members are foredoomed to eternal inferiority.