Say: 'He is called upon to estimate, with tolerable accuracy, the importance of a specific product, the probable amount of demand, and the means of production; sometimes to employ a great number of hands; again to buy or order raw materials, to combine the workers, find consumers, to exercise a spirit of order and economy. In the course of such operations there are obstacles to be surmounted, anxieties to be overcome, misfortunes to be repaired, and expedients to be devised.'