Knowledge is more a matter of learning than of the exercise of absolute judgment. Learning requires time, and in time the situation dealt with, as well as the learner, undergoes change.

Costs merely register competing attractions.

We have to adapt and overcome, that's all we can do.

The possibility of saying anything about a thing rests on the assumption that it preserves its identity, or continues to be the same thing in the respect described, that it will behave in future situations as it has in past.

Market competition is the only form of organization which can afford a large measure of freedom to the individual.

If all properly economic problems were solved once for all . . . the social struggle and strife would . . . [not necessarily] be reduced in amount or intensity . . . in the absence of some moral revolution which could by no means be assumed to follow in consequence of this change itself.

Sociology isthescience of talk, and there is onlyone law in sociology. Bad talk drives out good.