Oral delivery aims at persuasion and making the listener believe they are converted. Few persons are capable of being convinced; the majority allow themselves to be persuaded. – Johann von Goethe

That which proves too much, proves nothing! – Proverb

I would rather try to persuade a man to go along, because once I have persuaded him, he will stick. If I scare him, he will stay just as long as he is scared, and then he is gone. – Dwight D Eisenhower

That which we do not believe, we cannot adequately say; even though we may repeat the words ever so often. – Ralph Waldo Emerson