The deeper meaning of "Clothes Make the Man" is actually quite fascinating and empowering. By wearing a certain type of clothing, you can actually boost your self confidence in a real way. Besides having others viewing you based on the image which your clothing of choice gives off, you will begin to feel that way as well, just by wearing the clothing! For example, a new nervous nurse wearing Grey’s Anatomy scrubs, a designer nurse uniform, will feel more confident and will lead her to perform better at work. 

When people are new to a job or lacking confidence at work, dressing their role well can give them the boost of confidence they need to help them start performing well. This can be very especially helpful when starting out at a new job or field of work; dress your part, and dress it well and you will automatically start out with a great advantage to perform well and excel at your job.