Goods move in response to price differences from points of low to points of higher price, the movement tending to obliterate the price difference and come to rest.

Costs merely register competing attractions.

It is true practically if not altogether without exception that the changes studied by any science tend to equilibrate or neutralize the forces which bring them about, and finally to come to rest.

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.

All science is static in the sense that it describes the unchanging aspects of things.

Conflicting economic interest is relatively unimportant as a cause of war.

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.