As a matter of selective necessity, man is an agent. He is, in his own apprehension, a centre of unfolding impulsive activity-'teleological activity.' He is an agent seeking in every act the accomplishment of some concrete, objective, impersonal end. By force of being such an agent, he is possessed of a taste for effective work, and a distaste for futile effort.
Thorstein Veblen, R.H. Tawney, John Maynard Keynes (ed. 1990)