A highly developed stock exchange cannot be a club for the cult of ethics.

One can say that three pre-eminent qualities are decisive for the politician: passion, a feeling of responsibility, and a sense of proportion.

Daily and hourly, the politician inwardly has to overcome a quite trivial and all-too-human enemy: a quite vulgar vanity.

The experience of the irrationality of the world has been the driving force of all religious revolution.

Within the confines of the lecture hall, no other virtue exists but plain intellectual integrity.

[In] the realm of science, ... what we have achieved will be obsolete in ten, twenty or fifty years. That is the fate, indeed, that is the very meaning of scientific work. ... Every scientific "fulfillment" raises new "questions" and cries out to be surpassed rendered obsolete. Everyone who wishes to serve science has to resign himself to this.

The fully developed bureaucratic apparatus compares with other organisations exactly as does the machine with the non-mechanical modes of production.