"Would anyone walk into a lion's cage because both the lion and the cage, as we see them, are ultimately things constructed in our brains? More important, why not? Only because the verification processes so deftly made to disappear in theory could become very quickly, very brutally, and very agonizingly apparent. That is also the very reason why dogs do not run into a roaring flame and why bats swerve to avoid colliding with a stone wall. All these differently constructed worlds are subjected to verification processes. All these creatures' worlds, like our own, are indeed "perceptions" but they are not just perceptions. The position of the observer is indeed an integral part of the data, but it is not the only part of the data."

"But scientific inquiry into the problems of Socialism is not enough. We must also break down the wall of prejudice which at present blocks the way to an unbiased scrutiny of these problems. Any advocate of socialistic measures is looked upon as the friend of the Good, the Noble, and the Moral, as a disinterested pioneer of necessary reforms, in short, as a man who unselfishly serves his own people and all humanity, and above all as a zealous and courageous seeker after truth. But let anyone measure Socialism by the standards of scientific reasoning, and he at unce becomes a champion of the evil principle, a mercenary serving the egotistical interests of a dass, a menace to the welfare of the community, an ignoramus outside the pale. For the most curious thing about this way of thinking is that it regards the question, whether Socialism or Capitalism will the better serve the public welfare, as settled in advance to the effect, naturally, that Socialism is considered as good and Capitalism as evil - whereas in fact of course only by a scientific inquiry could the matter be decided. The results of economic investigations are met, not with arguments, but with that 'moral pathos', which we find in the invitation to the Eisenach Congress in 1872 and on which Socialists and Etatists always fall back, because they can find no answer to the criticism to which science subjects their doctrines."