Special emphasis should be laid on this intimate interrelation of general statements about empirical fact with the logical elements and structure of theoretical systems.

Sociology should... be thought of as a science of action-of the ultimate common value element in its relations to the other elements of action.

A gloss is a total system of perception and language.

It is probably safe to say that all the changes of factual knowledge which have led to the relativity theory, resulting in a very great theoretical development, are completely trivial from any point of view except their relevance to the structure of a theoretical system.

But the fact a person denies that he is theorising is no reason for taking him at his word and failing to investigate what implicit theory is involved in his statements.

The part an actor played on stage was once written on a separate roll of paper.

But the scientific importance of a change in knowledge of fact consists precisely in j its having consequences for a system of theory.