Preachers arouse fear. Emotions come from the so-called subconscious mind. The subconscious is crazy. It allows others to program it. We program it ourselves in periods of high emotions.
Most people run on emotions.
School doesn't teach us to reason. Emotions can be a driving force to make one achieve great things or a destructive force to make one fail and be miserable. In business, if you let yourself be ruled by your emotions, you'll soon be out of business. We are all programmed by our culture. We wouldn't think of eating dog meat, people, insects, snake or horse meat, yet millions of people do with great gusto.