Or in syllogistic form:

Those who see God are blessed.

The pure in heart see God.

Therefore, the pure in heart are blessed.

The great frequency of the enthymeme is explained by the very nature of reasoning, which—at least in the case of the true orator—ever proceeds from the known to the unknown. One of our propositions should either be self-evident or tacitly conceded; it need not therefore be expressed. The other must be brought out fully and proved by appropriate evidence, and from these two foundations we draw out the conclusion, or, what is only another way of accomplishing the same purpose, we state the conclusion and then give a reason for it, which itself rests upon another reason mentally supplied. We may test the correctness of the process by inquiring if the unexpressed reason be of the nature of a necessary, or at least of a generally received, truth; then, if the expressed reason is supported by impregnable evidence (which in the case of the beatitudes is the authority of Teacher Himself); and finally, if the conclusion inevitably results from the union of the two preceding parts.

Much might be said of fallacies and their various forms, but the student who has not time to pursue a full course of logic would find little profit in such a brief sketch as is here possible. It will be enough to point out that all false reasoning involves a violation of some logical rules, the simplest and most useful of which we have already pointed out. The orator who carefully defines his terms, who watches every comparison to see if it is real and not merely pretended, who refuses to accept a plausible statement for a universal truth, who notices what an argument takes for granted as carefully as what it states, will not be likely to commit glaring errors himself, or to be led into them by others.

In controversy a most important logical direction may be given. Strive to ascertain just the standpoint of the audience in regard to your subject. Every speaker has much in common with his hearers, and if he would convince or persuade them he must start from that common position.

In doing this there is no compromise of principle. It is simply leaving out of view points of difference until points of agreement are explored. From these an argument, as strong as logic can make it, should lead to the conclusion either in thought or action to which you wish your audience conducted. The eminent Methodist missionary, Rev. Wm. Taylor, in speaking to the heathen of Africa, used first to dwell upon those things in their belief which were common with his own, giving them credit for trying to worship the true God as well as they could, and then declaring that he came to them with a fuller revelation from the same source. In this way he persuaded thousands to accept his guidance and believe the Bible, who would have been utterly repelled if he had first attacked their superstitions, and tried to show that they were wrong in everything. In the same manner every masterly persuader of men must proceed. Seeking out all that he regards as true in their opinions and beliefs, he will waste no time in proving what they already believe, or in persuading them to do what they are already engaged in, but will show them other things which necessarily follow from what they already admit. St. Paul, on Mars’ Hill, got a great logical advantage by his reference to the Unknown God, and from this starting place he worked his way carefully to the new truth which he had to declare. A political orator may simply abuse the opposite party; but he makes no converts and wins no enduring laurels by that method. If he will strive to understand the position of his opponents and then from the great principles regarding government, which all parties hold in common, proceed to show that the side he advocates carries out those principles to their legitimate result, he may change votes, and will be sought for where the empty declamation of one who pursues the opposite course would be felt as a hindrance rather than a help. “What do you do when you have no case at all?” said one lawyer to another. “Oh!” was the reply, “I abuse the opposite counsel.” This was only a mode of covering a retreat, and may have answered that purpose well enough after the battle had been lost; but as long as there is any hope of convincing the judge or winning the jury, such abuse is worse than useless. The advocate should not, however, take his opponent’s view of the subject at issue as the groundwork of his argument, but that which he believes the jury to entertain. Success in this instance is not won by convincing an opponent, but by bringing over to his views that body of men in the jury-box who are supposed to be impartial, but who always have their mode of viewing any given subject—a mode which an ingenious and observant advocate will not be slow to discover.

There are three phases of any controverted question which the orator who will discuss it successfully needs to study. He should know and estimate justly all that a determined opponent of his own view can advance. Nothing is gained by failing to appreciate the strength and plausibility of an adversary’s position. Complete justice to an enemy is often the first step to complete victory over him. Then the position of that part of an audience—possibly few in numbers, but from the logical standpoint exceedingly important—who are in suspense, and as ready to fall to one side as the other, ought to be fully weighed. The more perfectly intellectual sympathy exists between them and the orator, the more likely is he to bring them over to his own party. And this is the great object to be aimed at. Pronounced opponents are not often converted. “A man convinced against his will is of the same opinion still.” The attention directed to them is really for the sake of the doubtful class who may, unless resistance is offered, be won over by their efforts.

Some attention may also properly be given by the speaker to confirming his own party by showing them the solid grounds upon which their opinions rest. But usually the same arguments which are likely to decide the wavering will best accomplish this purpose also. Beginning with a simple but clearly defined statement of those principles or facts upon which he intends to base his arguments, and about which no difference of opinion is possible, he shows clearly that the opinions he and his friends hold must follow from the grounds already conceded. This should be set forth as the establishment of positive truth rather than as the refutation of any errors; then, when the waverers have been convinced and his own party strongly confirmed, he may, with advantage, show the weakness and absurdity of the position of those who hold opposed views. Such a course pursued by an able reasoner who really has truth on his side, which he thoroughly understands, will seldom fail to win all whose minds are open to conviction.