The Holy Spirit convicts people of sin and awakens them to a newness of life. The Holy Spirit is the communicating factor of evangelism. The Holy Spirit is more important than a PA system is in communicating to your physical ear—he is the PA system of the soul.
Dwight L. Moody, the gifted evangelist, once went to London and the entire city responded to his preaching. Thousands were converted to Christ because of his ministry. A reporter from the London Daily Times went to the services one night to observe Mr. Moody and to see the secret of his success. When he heard Mr. Moody, he was shocked at his poor use of language and his appearance. In the morning edition of the newspaper he wrote: “Mr. Moody is overweight. He is very rough in his appearance. He has a nasal tone and speaks in a very high voice. I see nothing in Mr. Moody to account for his success.” When the evangelist read the story in the paper, he remarked to a friend, “That’s the secret of my success.”