After the sermon has been fully sketched, there follows its preparation for delivery. This should, ordinarily, consist not only in thinking through the contents of each part and mentally clothing the outline with flesh and blood, but in writing out, in extenso, the sermon in the form in which it is to be delivered. There are, indeed, exceptional preachers who are ready for the pulpit after a season of meditation on a fully worked-out sketch, and still more exceptional ones who do not even find it necessary to work out a full sketch. But, for the beginner, as well as for the majority of preachers, it should be an inflexible rule to write out a sermon, in full. This is made necessary by the demand for orderly arrangement of thought and expression discussed above.
The writing of the sermon forms the best and most thorough preparation for its delivery. In the process of writing, the preacher will often discover inconsistencies and obscurities of his interpretation or application of the text, and may find himself compelled to discard his outline and begin afresh. The writing of sermons promotes logical order, not only in the main divisions but in every part. It arms the preacher against the possible event of indisposition, mental or physical. It makes possible a choice of language appropriate to the subject and the hearer and characterized by convincing clearness, pleasing elegance, and moving power. It affords an opportunity to plan carefully, in advance, the whole process of delivery, making due allowance for the inspiration that may come in the pulpit, so that the sermon will not be merely reproduced but delivered as a fresh production. It guards against the pitfalls of improvisation – unwarranted and far-fetched statements, cant phrases, incoherent ranting, a slovenly style, and a halting, uncertain delivery – as well as against the pitfalls of extemporaneous speaking: vagueness of thought, diffuseness of language, and a lack of continuity. On the preacher of restless mind and wandering fancy, it exerts a restraining influence while, to the preacher of heavy tongue and slow-moving mind, it becomes a source of confidence and ease.
After the sermon is written, it should be fixed in the memory…
From: Homiletics: A Manual of the Theory and Practice of Preaching by Johann Michael Reu; translated from the German by Albert Steinhaeuser (Chicago: Wartburg Publishing House, 1922), pp. 508-509.
Johann Michael Reu (1869-1943) was Professor of Theology at Wartburg Theological Seminary in Dubuque, Iowa, from 1899 to 1943.