The fact that a man is to vote forces him to think. You may preach to a congregation by the year and not affect its thought because it is not called upon for definite action. But throw your subject into a campaign and it becomes a challenge.
If you are to reach masses of people in this world, you must do it by a sign language. Whether your vehicle be commerce, literature, or politics, you can do nothing but raise signals, and make motions to the people.