"Man is an agent... a center of unfolding impulsive activity—"teleological" activity... seeking... some concrete, objective, impersonal end. ...he is possessed of a taste for effective work, and a distaste for futile effort. He has a sense of the merit of serviceability or efficiency and of the demerit of futility, waste, or incapacity. This aptitude or propensity may be called the instinct of workmanship."