Clearly there are certain types of industry to which they are only partially relevant. It can hardly be assumed, for example, that the degree of skill and energy brought to his work by a surgeon, a scientific investigator, a teacher, a medical officer of health, an Indian civil servant and a peasant proprietor are capable of being expressed precisely and to the same degree in terms of the economic advantage which those different occupations offer. Obviously those who pursue them are influenced to some considerable, though uncertain, extent by economic incentives. Obviously, again, the precise character of each process or step in the exercise of their respective avocations, the performance of an operation, the carrying out of a piece of investigation, the selection of a particular type of educational method, the preparation of a report, the decision of a case or the care of live stock, is not immediately dependent upon an exact calculation of pecuniary gain or loss. What appears to be the case is that in certain walks of life, while the occupation is chosen after a consideration of {157} its economic advantages, and while economic reasons exact the minimum degree of activity needed to avert dismissal from it or "failure," the actual level of energy or proficiency displayed depend largely upon conditions of a different order. Among them are the character of the training received before and after entering the occupation, the customary standard of effort demanded by the public opinion of one's fellows, the desire for the esteem of the small circle in which the individual moves and to be recognized as having "made good" and not to have "failed," interest in one's work, ranging from devotion to a determination to "do justice" to it, the pride of the craftsman, the "tradition of the service."