Spencers god was Evolution, sometimes also called Progress.

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

If observed facts of undoubted accuracy will not fit any of the alternatives it leaves open, the system itself is in need of reconstruction.

A gloss is a total system of perception and language.

The functions of the family in a highly differentiated society are not to be interpreted as functions directly on behalf of the society, but on behalf of personality.

If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.

Empirical interest will be in the facts so far as they are relevant to the solution of these problems.