Only through his capacity for adaptability does the force of the written word approach that of oral speech. The orator may deal with the same subject as a book deals with; but if he has the genius of a great and popular orator he will scarcely ever repeat the same argument or the same material in the same form on two consecutive occasions. He will always follow the lead of the great mass in such a way that from the living emotion of his hearers the apt word which he needs will be suggested to him and in its turn this will go straight to the hearts of his hearers. Should he make even a slight mistake he has the living correction before him. As I have already said, he can read the play of expression on the faces of his hearers, first to see if they understand what he says, secondly to see if they take in the whole of his argument,