The butter not only adds richness to the burger and prevents it from drying out, but it also butters the bun for you. We're not going to downplay it, these burgers are decadent. But, if you're going to eat a burger, you may as well do it right. And, this recipe does it so right.
The word persistence means the quality of being determined to do or achieve something. It's tenacity. It means firmness of purpose. It is a continuing, repeating or lasting of something. Use the link and read a few similar definitions.
Persistence Is Self-Discipline in Action. Perhaps the most important demonstration of self-discipline is your level of persistence when the going gets tough. Persistence is self-discipline in action. Persistence is the true measure of individual human character. Your persistence is, in fact, the real measure of your belief in yourself and your ability to succeed. Each time that you persist in the face of adversity and disappointment, you build up the habit of persistence.