Robert McKee, in his book, Story: Substance, Style, and the Principles of Screenwriting, says the following about storytelling.
In 388 B.C. Plato urged the city fathers of Athens to exile all poets and storytellers. They were a threat to society, he argued. Writers deal with idea, but not in the open, rational manner of philosophers. Instead, they conceal their ideas inside the seductive emotions of art. Yet felt ideas, as Plato pointed out, are ideas nonetheless. Every effective story sends a charged idea out to us, in effect compelling the idea into us, so that we must believe. In fact, the persuasive power of story is so great that we may believe its meaning even if we find it morally repellent. Storytellers, Plato insisted, are dangerous people. He was right.
I imagine that along with poets and storytellers one could include actors and journalists and politicians. Regardless, there are several things to take from this.
For one, the power of story has been known and realized for a very long time. However, this is not to say that everyone realizes the power of story.
Also, because stories can convey what is the opposite of the good, the true, and the beautiful, we should be ever-conscious when we encounter stories, both those with presented with the explicit intent to persuade hearers of some conviction, as well as those that are not so explicit.
A third observation is that in our desire to persuade others of the truth, it behoves us to be able not only to present rational argument, and not only to embody the very truths we seek to convey, but also that we endeavor to couch what is good, what is true, what is beautiful, and what is just in compelling narratives.
On the next page McKee writes: