The first reason is that it is appropriate both to the temperament and the training of the preacher.  There are three grand divisions, or rather determining emphases, by which men may be separated into vocational groups.  To begin with, there is the man of the scientific or intellectual type.  He has a passion for facts and a strong sense of their reality.  He moves with natural ease among abstract propositions, is both critical of, and fertile in, theories; indicates his essential distinction in his love of the truth for the truth’s sake.  He looks first to the intrinsic reasonableness of any proposition; tends to judge both men and movements not by traditional or personal values, but by a detached and disinterested appraisal of their inherent worth.  He is often a dogmatist, but this fault is not peculiar to him, he shares it with the rest of mankind.  He is sometimes a literalist and sometimes a slave to logic, more concerned with combating the crude or untenable form of a proposition than inquiring with sympathetic insight into the worth of its substance.  But these things are perversions of his excellencies, defects of his virtues.  His characteristic qualities are mental integrity, accuracy of statement, sanity of judgment, capacity for sustained intellectual toil.  Such men are investigators, scholars; when properly blended with the imaginative type they become inventors and teachers.  They make good theologians and bad preachers.

Then there are the practical men, beloved of our American life.  Both their feet are firmly fixed upon the solid ground.  They generally know just where they are, which is not surprising, for they do not, for the most part, either in the world of mind or spirit, frequent unusual places.  The finespun speculations of the philosophers and the impractical dreams of the artist make small appeal to them; the world they live in is a sharply defined and clearly lighted and rather limited place.  They like to say to this man come and he cometh, and to that man go and he goeth.  They are enamored of offices, typewriters, telegrams, long-distance messages, secretaries, programs, conferences and drives.  Getting results is their goal; everything is judged by the criterion of effective action; they are instinctive and unconscious pragmatists.  They make good cheer leaders at football games in their youth and impressive captains of industry in their old age.  Their virtues are wholesome, if obvious; they are good mixers, have shrewd judgment, immense physical and volitional energy.  They understand that two and two make four.  They are rarely saints but, unlike many of us who once had the capacity for sainthood, they are not dreadful sinners.  They are the tribe of which politicians are born but, when they are blended with imaginative and spiritual gifts, they become philanthropists and statesmen, practical servants of mankind.  They make good, if conservative, citizens; kind, if uninspiring, husbands and deplorable preachers.