I think we believe in a person's saying/writing if they have good ethos, pathos, and logos. If they have developed those characteristics, then they are better at expressing opinions, stating facts, and are just a more reliable source. Also, their voice plays a key part of their believability. If the speaker/authors have a good voice then more people will want to listen to what they say. Personally, I want to listen to someone if they are good at story telling. A good story teller can captivate their audiences and keep their attention til the very end. For example, Sarah Kay's TED talk was filled with story telling, in the form of spoken poetry. Her poetry kept the audience on the edge of their seats, wondering what she would say next. The power of voice is something that can influence many people. When did the power of voice become so powerful? It can be used for good or bad, and people eat up a good