The way to do that is by client/customer testimonials. A testimonial doesn’t have to be long or elaborate or go into every tiny detail but should tell how wonderful you are personally (if they dealt with you). A good testimonial should go into how satisfied they were with your work, how your company saved the day (maybe even did a rush job), how your specialty work was exactly what they needed. They can also describe how you, your staff and your company in general have the knowledge that brought it all together for them.