Men are usually competent thinkers along the lines of their specialized training only. Within these limits alone are their opinions and judgments valuable; outside of these limits they grope and are lost--usually without knowing it. In a church assemblage of five hundred persons, there will be a man or two whose trained minds can seize upon each detail of a great manufacturing scheme and recognize its value or its lack of value promptly; and can pass the details in intelligent review, section by section, and finally as a whole, and then deliver a verdict upon the scheme which cannot be flippantly set aside nor easily answered. And there will be one or two other men there who can do the same thing with a great and complicated educational project; and one or two others who can do the like with a large scheme for applying electricity in a new and unheard-of way; and one or two others who can do it with a showy scheme for revolutionizing the scientific world's accepted notions regarding geology. And so on, and so on. But the manufacturing experts will not be competent to examine the educational scheme intelligently, and their opinion about it would not be valuable; neither of these two groups will be able to understand and pass upon the electrical scheme; none of these three batches of experts will be able to understand and pass upon the geological revolution; and probably not one man in the entire lot will be competent to examine, capably, the intricacies of a political or religious scheme, new or old, and deliver a judgment upon it which any one need regard as precious. There you have the top crust. There will be four hundred and seventy-five men and women present who can draw upon their training and deliver incontrovertible judgments concerning cheese, and leather, and cattle, and hardware, and soap, and tar, and candles, and patent medicines, and dreams, and apparitions, and garden trucks, and cats, and baby food, and warts, and hymns, and time-tables, and freight-rates, and summer resorts, and whiskey, and law, and surgery, and dentistry, and blacksmithing, and shoemaking, and dancing, and Huyler's candy, and mathematics, and dog fights, and obstetrics, and music, and sausages, and dry goods, and molasses, and railroad stocks, and horses, and literature, and labor unions, and vegetables, and morals, and lamb's fries, and etiquette, and agriculture. And not ten among the five hundred--let their minds be ever so good and bright--will be competent, by grace of the requisite specialized mental training, to take hold of a complex abstraction of any kind and make head or tail of it.