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

It is our task to inquire into the causes that have brought about the observed differentiation, and to investigate the sequence of events that have led to the establishment of the multifarious forms of human life

My parents had broken through the shackles of dogma

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

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.

The disease of mutual distrust among nations is the bane of modern civilization

My father had retained an emotional affection for the ceremonial of his parental home, without allowing it to influence his intellectual freedom