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

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

I object to teaching of slogans intended to befog the mind, of whatever kind they may be

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

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.

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.