Why do some people throw away their credibility like its a used tissue? Credibility is more important than intelligence or creativity. In business, you want to be known as a person who does what he says he’s going to do. That means; call when you say you’re going to call, be where you say you’re going to be (at the designated time) and do what you say you’re going to do. Excuses went out in high school. It’s a great feeling to know you are reliable too!