"True science consists in systematically examining all possible cases. Exact political economy has not achieved this u…"

"We are like sailors who on the open sea must reconstruct their ship but are never able to start afresh from the botto…"

"Although what is called ‘philosophical speculation’ is undoubtedly on the decline, many of the practically minded hav…"

"Science as a system of statements is always an object of discussion. Statements are to be compared with statements, a…"

"Finally it should be noted that the picture education, especially the pictorial statistics, are of international impo…"

"All content of science, and also their protocol statements that are used for verification, are selected on the basis …"

"Quite a few political economists advocate the thesis that a Robinson Crusoe — or what amounts to the same thing, a co…"

"The primordial forms of all sciences, taken back beyond the rise of writing, lie ultimately in the magic of prehistor…"

"What we have of systematic and orderly action and speech ... seems to go back to primeval systematic orderliness as f…"

"‘History’ and ‘Political Economy’ have not been differentiated on the basis of systematic reflection; rather, they ha…"