Of the value of an introduction which lays out the ground to be covered I have already spoken. The more distinct an idea you can implant in your readers' minds of the course you are going to follow in your argument, the more likely they will be to follow it. Since the success of your argument hangs on carrying them with you on the main issues, let them know beforehand just what those issues are, and in such a way that they can hold them with a minimum of effort. The value of a clear and, as it were, maplike introduction is even greater in an argument than in an exposition.

In the second place, use your paragraphing for all that it is worth, and that is a great deal. The success of any explanation or argument springs from the way in which it takes a mass of facts apart, and rearranges them simply and perspicuously; and there is no device of composition which helps so much towards clearness as good paragraphing. Accordingly when you come to make your final draft, make certain that each paragraph has unity. If you have any doubts see if you can sum up the paragraph into a single simple sentence. Then look at the beginnings of the paragraphs to see whether you have made it easy for your readers to know what each one is about. Macaulay's style is on the whole clearer and more effective for a general audience than that of any other writer in English; and his habit of beginning each paragraph with a very definite announcement of its subject is almost a mannerism. Incidentally there is no better rough test of the unity of your paragraphs than thus to give them something of the nature of a title in the first sentence. Often, too, at the end of an important paragraph it is worth while to sum up its essence in pithy form. Mankind in general is lazy about thinking, and more than ready to accept an argument which is easy to remember and repeat. The end of a paragraph is the place for a catchword.

In the third place, bind the sentences in your paragraphs together. When one is building up a first draft, and picking facts from a variety of sources, it is inevitable that the result shall be somewhat disjointed. In working over the first draft, really work it over, and work it together. Make all the sentences point the same way. Pronouns are the most effective connectives that we have; therefore recast your sentences so that there will be as little change of subject as possible. Then use the explicit connectives in as much variety as you can. It is not likely that you will make your paragraphs too closely knit for the average reader.

In the fourth place, bind your argument together as a whole by connectives at the beginnings of the paragraphs and by brief summarizing paragraphs. In the present generation of schoolboys a good many have groaned over Burke's speech "On Conciliation with America"; but if the first time that one of these sufferers must make an argument in real earnest, he will go back to Burke for some of the devices used to bind that argument together, he will be surprised to see how practically e efficient those devices are. And none of them counts more for clarity and thoroughness than the conscientious way in which Burke took his hearers by the hand at the beginning of each paragraph, and at each turn in his argument, to make sure that they knew just how they were passing from one point to another.

From the doctrine of clear explanation, then, we may carry over to the making of clear arguments the habit of laying out the ground at the beginning, of making the paragraphs do their full work by attending to unity, to emphasis, and to coherence, and of binding the paragraphs together into a closely knit whole.

55. The Power of Persuading. Finally, we have to consider the question of how an argument can be made persuasive—probably the most difficult subject in the range of rhetoric on which to give practical advice. The key to the whole matter lies in remembering that we are here dealing with feelings, and that feelings are irrational and are the product of personal experience. The experience may be bitter or sweet, and to some degree its effects are modified by education; but in substance your feelings and emotions make you what you are, and your capacities in these directions were born with you. If the citizens of a town have no feeling about political dishonesty, reformers may talk their throats out without producing any result; it is only when taxes get intolerable or the sewers smell to heaven that anything will be done. Many people die for whose deaths each of us ought to feel grief, but if these people have never happened to touch our feelings, we can reason with ourselves in vain that we should feel deeply grieved. Feeling and emotion are the deepest, most primitive part of human nature; and very little of its field has been reduced to the generalizations of reason.[59][!--Note--]

When you come, therefore, in the making of your argument to the point of stirring up the feelings of your readers on the subject, do not waste any time in considering what they ought to feel: the only pertinent question is what they do feel. On your shrewdness in estimating what these feelings are, and how strong they are, will hang your success as an advocate. Tact is the faculty you need now—the faculty of judging men, of knowing when they will rise to an appeal, and when they will lie back inert and uninterested. This is a matter you cannot reason about; if you have the faculty it will be borne in on you how other men will feel on your subject. The skill of politicians, where it does not confine itself to estimating how much the people will stand before rebelling, consists in this intuition of the movement of public opinion; and the great leaders are the men who have so sure a sense of these large waves of popular feeling that they can utter at the right moment the word that will gather together this diffused and uncrystallized feeling into a living force. Lincoln's declaration, "A house divided against itself cannot stand, I believe that this government cannot endure permanently half slave and half free," brought to a head a conflict that had been smoldering ever since the adoption of the Constitution, and made him the inevitable leader who was to bring it to a close. It will be noticed, however, that the time had to come before the inspired word could make its appeal. The abolitionists and antislavery men had long been preaching the same doctrine that Lincoln uttered, and the folly and wickedness of slavery had been proved by philosophers and preachers for generations. Until the time grows ripe the most reasonable doctrine does not touch the hearts of men; when the time has ripened, the leader knows it and speaks the word that sets the world on fire for righteousness.

The same faculty, on a smaller scale, is needed by every one of us who is trying to make other people do anything. The actual use of the faculty will vary greatly, however, with different kinds of arguments. In certain kinds of scientific argument any attempt at persuasion as such would be an impertinence: whether heat is a mode of motion, whether there are such infinitesimal bodies as the ions which physicists of to-day assume to explain certain new phenomena, whether matter consists of infinitesimal whirls of force—in all such questions an argument appeals solely to the reason; and in such Bacon's favorite apophthegm has full sway, Dry light is ever the best. In Huxley's arguments for the theory of evolution feeling had some share, for when the theory was first announced by Darwin some religious people thought that it cut at the foundations of their faith, and Huxley had to show that loyalty to truth is a feeling of equal sanctity to scientific men: hence there is some tinge of feeling, though repressed, in his argument, and a definite consciousness of the feelings of his audience.

At the other extreme are the arguments where the appeal to feelings is everything, since it is clear that the audience is already of the speaker's way of thinking. Examples of such arguments are most apt to be found in speeches in political campaigns and in appeals for money to help forward charities of all kinds. It is probable that most of the conversions in political matters are through reading; consequently the purpose of the speeches is to stir up excitement and feeling to such a heat that the maximum of the party voters will take the trouble to go out to the polls. Arguments directed to this class, accordingly, are almost wholly appeals to feeling. The famous debate between Lincoln and Douglas in 1858 was of this character; of the thousands of people who heard them in one or another of the seven debates most had taken sides already. In such a case as this, however, where a change in general political opinion was impending, the reasoning of the debates had more force than in ordinary times, and probably helped many voters to a clearer view of a very distressing and harassing situation. Between times, however, in politics, where there are no great moral or practical differences between parties, the purpose of speeches is almost wholly persuasive. Success one way or another is a question of getting out the voters who more or less passively and as a matter of habit hold to the party. Party speakers, accordingly, use every device to wake up their voters, and to make them believe that there is a real crisis at hand. Every attempt is made to attach moral issues to the party platforms, and to show how the material prosperity of the voters will fail if the other party wins.

Roughly, therefore, we may say that persuasion tends to play a small part in arguments of facts, and a larger part in questions of policy. This is a rough generalization only, for every one knows what eloquence and efforts at eloquence go into the arguments before juries in capital cases, and how dry and abstract are the arguments before the judges on points of law, or on questions of public policy in books of political economy. But in the long run, the less feeling enters into decisions of questions of fact, the better.