This description is about the importance of maintaining a professional attitude in all aspects of life. It emphasizes the importance of being respectful, courteous, and responsible in all interactions. It encourages people to be mindful of their words and actions and to always strive to present themselves in a professional manner.
From Wikipedia
It's Always Sunny in Philadelphia is an American sitcom created by Rob McElhenney and co-developed by Glenn Howerton for FX, currently airing on FXX. The show premiered on August 4, 2005, and stars Charlie Day, Howerton, McElhenney, Kaitlin Olson, and Danny DeVito, with Day, Howerton, and McElhenney as executive producers.